You seem to be equating the scale of the conflict with the importance of individual deaths: I don't get that I'm afraid, and I suspect the loved ones of those lost in the Falklands felt no less bereaved that the loved ones did for those lost in WW2.
But the scale is important because you magnify that individual tragedy and feeling of loss 5000 times.
And there is another factor, which was discussed earlier in the thread - when numbers of deaths are small it is possible for every one to be remembered and commemorated individually. The example I used upthread was Afghanistan where, I think, pretty well every death was reported on the news, each dead soldier named individually in the media, every one with a ceremony at Wooton Basset (again often commemorated on the news). You can go to a page and read each of their names and their stories - go to another and each one has a photograph.
https://en.wikipedia.org/wiki/British_Forces_casualties_in_Afghanistan_since_2001http://metro.co.uk/2014/10/26/victims-of-afghanistan-roll-call-of-the-british-soldiers-and-staff-who-died-for-their-country-4922099/But as the numbers get bigger and bigger that becomes simply impossible as the scale becomes so overwhelming that it becomes impossible to commemorated each one individually, which is why there is the need for the commemoration en masse for the dead of the world wars. The shear scale of the deaths from the world wars means that they cannot be commemorated individually in the manner that is possible, and is done, for much smaller conflicts.
Think about it this way - were we to wish to commemorate the Falklands dead and wanted to read out every name of a soldier who had died, it might take us about 12 minutes from start to end - completely doable - to do the same for the dead of the 2 world wars (to individual recognise them by name) would take one and a half months. It isn't possible to give each individual the respect they deserve, in the manner that is possible where deaths are in the 100s - that's why they should be the focus of the mass commemoration that is the November remembrance event in my opinion.
If the aim is to remember the fallen I can't understand we shouldn't remember all who fell.
Including those before 1945 who didn't die in the world wars? They are currently not part of the commemorations - so the event already restricts and limits - it does not cover
all who have died in conflicts, only some. So the discussion in a way is how we limit - we might differ in our opinion on that, but both my preferred approach and the current approach do limit those who are remembered. And to try to remember every single person who died in conflict ever would create something so nebulous as to be rather meaningless.