In summer of 2023 I was technically obese based on BMI. I retired from full time work in December 2023 and have, since then, lost 17kg. That's 2 stone 9 in old money. How did I do it? I had the time to cook for myself, so I stopped eating ready meals and supermarket pizzas. This was not a conscious effort to lose weight, it was just a byproduct of the fact that I had time not to eat processed foods.
There has to be something wrong with our processed foods, if just cutting them out of my diet can have such a dramatic effect.