I dislike all of those people, not because they’re old. I also take issue with their clear mental disability. If they were actually intelligent and mentally capable and good people, I wouldn’t have a problem with them.
Yes, I understand That age is a decent indicator for mental capability, and that we use that as a safeguard in other areas like airline pilots.
So, for practical reasons, an age limit makes sense. But I am speaking philosophically from the heart.