> How about the QOL of not knowing for a long time whether you'll succeed or fail? Or having to deal with investors, marketing, managing people, aka everything that you probably don't want to be working with?

This is kind of silly to bring up. Obviously people starting a company are okay with managing people and dealing with investors (or if not, being bootstrapped). You're saying "being an elite athlete sucks because you have to deal with working out and eating healthy" like.. yeah, you kind of signed up for that. You can't be an NFL player and eat donuts all day.

> FIRE in your 30ies.

This is ironically very similar to doing a startup (but with less risk, and a lower upside). Are you forgetting that investing didn't go so well for people in 2008? I actually like the FIRE movement.