To me, if your whole life is just building up to retiring and then
finally enjoying your life, you've picked the wrong career. I need something I can derive satisfaction and purpose from. Keep the body in motion to keep it operational. Keep pure leisure time more meaningful. Lose your purpose, and your body knows it. I'm not setting myself up so my last twenty years as a geezer are the only good years. I read what people do on here and watch retirees myself. Honestly, I've yet to see a retired lifestyle I find all that more appealing than my own.
You could die right before or after planned retirement like some warn, then again you could have something kill you by 40 or outlive your finances for decades and end up working some piddly dog
job just to finish getting by anyway. And if you have to get a "retirement job" just to keep busy, was it really time to retire in the first place?