To me this is really about whether someone can still do the job when it matters, not about respecting elders. If we have age limits for other high pressure roles, it seems reasonable to ask the same of people making huge decisions. I am not sure about the details, but that is my gut feeling.

Airline pilots face a retirement age because reaction time matters at thirty thousand feet. My opponent makes a fair point about respecting people, and I am not sure how to argue that down. Still, my gut says politicians over 75 making split second calls should face some limit too.

A surgeon stepping away at a certain age is a real world example. My opponent says people are human, sure, but that does not answer whether someone over 75 can handle the job. I am not sure how to argue beyond that.