It’s not that simple. I felt the same way before I crossed the FIRE threshold and took some time off (mini-FIRE, I guess).
It turns out, most of the things I had been putting off weren’t as time consuming as I thought. I found myself regretting not doing many of them sooner, such as putting a few hours in on weekdays and weekends or scheduling a 1-week vacation to make a trip happen.
It’s hard to truly understand until you’ve crossed the threshold and tried it, but there’s a certain aspect of FIRE discussions that divides life too much into pre-retirement and post-retirement activities in a way that isn’t always necessary. In retrospect, there was little stopping me from doing most of the things I wanted to do while I was working, and plenty of people do manage to accomplish a balance of work and other things just fine.
I’m not alone in this. Even the author of this blog later returned to work after his interest in his writing hobby slowed to a crawl, his friendships started dwindling, and his relationship came to an end at least in part due to the FIRE lifestyle: https://livingafi.com/2021/03/17/the-2021-early-retirement-u...