Being older than 16 doesn’t automatically make you more sensible, as evidence of this I present Liz Truss. 16 is the age you become an adult in law so it’s only right that they get the vote. You’re being deliberately flippant saying why not let 13 year olds and it adds nothing to the discussion. For the record I wouldn’t consider banning over 75 year olds from voting, I’m just making the point that there’s more of an argument to allow 16 year olds vote than there is over 75’s.
I think the crux of the problem is that the older generations don’t like that it’s 16+ year olds that are shaping the country so they want to delay that process. Despite the fact that when they were in their teens right up until they retired they were the ones shaping the country. The national service argument is the ideal example of this. I’m 51 and I’m hearing some people of a similar age and older going yeah that’s a good idea, that will sort out the youth. Oblivious to the fact that old people were saying the exact same thing about them when they were a teenager. Yes your children and grandchildren don’t hold all your values, suck it up snowflakes, your grandparents and parents probably had the same issue with you when you were younger.