Let me just stop you there.
You do understand that the barriers to higher level education aren't just about direct cost of study, but a whole raft of other barriers to opportunity, some of which are also financial. The most notable being that in order to be able to become a doctor you will need to stay in study for many years beyond the end of compulsory study and that means not earning a full time wage, even if study itself is free. So when compulsory education end (which would be way earlier than the current 18 in the UK, back in the 60s in India) them most parents couldn't afford a non wage earner - for most people, regardless of their inherent intellectual abilities, it was off to work for you. Absolutely no opportunity for further study which would have needed before you came close to medical school.
I understand that the barriers to higher level education could be because a person needed to be a wage-earner in order for their parents to be able to afford to eat or have a roof over their heads, and therefore a person could not take the time off to study to improve their future without their parents suffering hardship in not having an extra pair of hands to bring in a wage to the family.
On the other hand, I don't think you understand that funding for higher level education often included funding for living expenses for the student, so in those circumstances education abroad was possible for people who did not have family wealth. This was certainly the case for my father. He even managed to do a 4 year Civil Engineering degree course in 3 years, thanks to support given to him by the teaching staff at the university in Israel and his fellow international students he was sharing with, who took care of his personal admin and cooking responsibilities so he would have more time to do the extra study required to do a 4 year degree in 3 years.
Add to that the competition for places - then as now private education was for the elite few and would presumably have provided much greater likelihood for those fortunate few who benefitted to gain the top grades. So for the vast majority the notion of medical school was a pipe dream - typically they would have been expected to leave school and start earning as soon as possible and even if they did remain in a state funded school they'd be competing for the tiny number of places at medical school with the elite few who were being educated privately with resources they can only dream at. That medical school, once you get there, might have been free is irrelevant. Medical school education in the UK was also free - that didn't mean that the places weren't overwhelmingly taken by those already from highly advantaged middle class professional backgrounds.
I genuinely think that your background really prevents you from seeing the wood for the trees.
Yes I agree that private school confers a major advantage for those who can afford it either through family wealth or a school bursary. But not sure where this applies to Sunak's grandmother's story of arriving in the UK alone and getting a bookkeeping job to pay for renting a room in a house and saving to bring her family over. Are you saying that renting a room in a house and working as a bookkeeper was beyond the ability of most British people in the 1960s?
I also don't think you understand that there are many people, who even if they had the funds and opportunity to go into higher education, would probably still not have the nature / nurture to become very successful. Not everyone can achieve the same level - there will always be a few whose natural ability and particular life experiences will spur them onto greater success than others who do not possess that particular combination of genetic make-up and life experiences. And once they are successful, people connected to them will also more than likely benefit from their success.
Just something as simple as parents regularly reading to or conversing with their children before they reach the age of 2 has been shown, on average, to have a positive impact on those children's educational outcomes, for obvious common sense reasons. Many immigrant families achieve this by grandparents living with grandchildren - an easy on tap educational and conversational resource for grandchildren, free help with daily childcare plus a good way of sharing the burden of living costs as there is no need to run 2 separate houses. For these type of reasons, there is no equality of opportunity in life. People who get on with their families and who live in an extended family system seem to have an opportunity for self-improvement that is not available for people who live in a different family set-up.
My family and I have not achieved anywhere near the successes of Rishi Sunak, and nor would any of us have been likely to, even though we had similar opportunities to him, and that is probably because of the differences in a combination of nature/nurture between us and the Sunaks that contributed to different ambitions and aptitudes. Even if you had put me or my brother in Winchester, I doubt very much the trajectory of our lives would have been similar to Sunak's, and this is despite my brother being accelerated a year at school and doing his O'Levels and A'Levels a year younger than most of the other pupils at his private school. My opinion has nothing to do with which party I might vote for in a General Election - as it happens I have always voted Labour in the past because my local Labour MP seemed to be doing a good job. However, given Labour's current position on ignoring the biological disadvantage and risk to women by prioritising trans rights on certain issues , Labour will not be getting my vote.
You seem to think that there is something to be gained by simplistically misrepresenting people's opinions on a particular issue as evidence that they are a "fan-boy" or "fan-girl" of a particular political party or politician. Maybe it makes you feel better to think that about a poster - but it just reveals your own inadequate ability to present a persuasive argument on the actual issue being discussed.