While young people can be considered immature until certain age, old people have big taboo about senility and dementia. As you are not allowed to vote and drive until certain age, you should not be allowed to vote and drive since certain age, because your brain could be considered immature again through degeneration.

There's dumb black people and smart black people therefore black people are dumb. Its PRAGMATIC TO THINK THIS.

You see how stupid you sound?

That is a complete mischaracterization of what I was saying. There are multiple considerations, both legal and moral.

But pragmatism plays a role in the pervasive ageism in our culture, as we have decided it is largely legal.

If you're capable of abstraction I'm reframing your point EXACTLY.

Also, Discriminating based on age is largely legal.

Are you sure about that?