Regardless of their political or policy views, Biden is just way too old for the position. So, is Trump. Maybe that makes me an ageist, but it starts and ends there for me.
You’re not an ageist, but age is relative. Biden at 80 is showing dangerous lapses. Many people, nowadays are still sharp well into their 90s. But I agree with you. 70 is probably a good cut-off age for the most important job on the planet.
Otherwise I’d run and we’d all be having a shit-hot great time.