Blunt tools shouldn’t be used for complex real-world things. Other examples would be mandatory sentencing in courts (you should let the judge assess the particular situation), or things like “I don’t go out with guys under 160cm” (you should get to know him).
Just because someone is in their 70s, doesn’t mean they can’t lead. Not with any certainty. In some cases it does, but the political process should have the flexibility to deal with each case.
Look at Deng: he was mid-70s to mid-80s when he was in power and he improved the lives of 10⁸ or 10⁹ people.
https://en.m.wikipedia.org/wiki/Deng_Xiaoping
PS Not OP, I just searched “Deng political leader” and found the above wikipedia article, the age matches so I think this is the person OP is referring to, but I may be wrong.
Yep right Deng. Tankies like to forget about the Tiananmen Square part of his resume.
The wilipedia article was an interesting read. https://en.m.wikipedia.org/wiki/1989_Tiananmen_Square_protests_and_massacre