IMO, there's a big difference between your 62 and Hillary's 68 (almost 69). Seven years is a fair bit, then add in her serious health problems, and there's an issue.
Does that mean that I think every 60-something should be put out to pasture? Heck no.
But if I - AT ANY AGE - couldn't manage to stand up straight, or walk up a flight of steps without help, I hope that I'd be responsible enough to say, "You know, maybe this whole 'leader of the free world' isn't my bag. Might be time to start enjoying what time I've got left...."
Of course, when you're a shallow, self-centered, narcissistic megalomaniac like Hillary! ... that thought wouldn't cross her mind until it was too late.
She is in denial.