unless they were doing longevity research

really? what about people who wish they had "done more with [their] life" or "done something more meaningful." I'm sure many people think this. They look back on an easy-going life with a good amount of leisure and wonder what it was all for.

I think that "done more with their life" isn't the same as working more hours.

I think you are wrong about this. I deeply regret a couple of times earlier in my life where I didn't give something my all.

Giving something your all, which I wholly support, is not the same as time spent at work, sitting at a desk.

And as someone else said, I doubt you're at the end of your life. At least, I hope not!

Speak for yourself. My work hours are some of the best hours of my life.

You are almost certainly not currently near the end of your life.