The thread is about post FIRE. I have a lot of personal experience with it and through my peers and clients. I understand the appeal. You are miserable and worn out in your overworked professional lives.
The idea of lazy days selling turnips at the farmer's market is not a complete picture. Van life can lose its charm fast. Yesterday I was reading an article in the USA Today and there is actually a term for those who return to work after retirement. It is called a "Boomerang Employee". Sometimes it means going back to a previous employer, however often it means putting in the blue vest.
That is all that I am saying. Days off lose their meaning. Hobbies become boring and social lives dry up. People get bored and often the money runs out too fast. A lot of the appeal of FIRE is an illusion. It is better though if you achieve FIRE after you have enjoyed a full career and your peers are also retired.
I have been FIREd for about 3 years, from ages 42-45. They have, unequivocally, been by far the best years of my life. I had been on the fast track in my little part of megacorp straddling the line between management and technical work. I was in various roles like "Chief Engineer" when they needed someone who could interact with our government customer in a technical role, or "Project Manager" when they needed someone technical who could do the planning to get a project up and running. At my "peak" I was the Integration and Test Lead for one software build of a very, very large government program. I was not in any way "miserable and worn out in (my) overworked professional (life)". I think I maintained a good work/life balance, I had the respect of my peers and management, and I always had top results on the surveys of my employees. I only offer this context to unequivocally state you are absolutely incorrect - many of us are not trying to escape a "miserable and ... overworked professional life."
You're also wrong that days off lose their meaning. I volunteer as a math tutor at the library near an "alternative" school. Most students there have had difficulties in the public school system and have this as a backup option. I have helped students who are good at math but think they're bad at math gain confidence. I've helped students prepare for the SAT and ACT. I've helped students get caught up after falling behind. This absofuckinglutely fills my days with meaning. I also volunteer with my alma mater, helping students get internships, refine their resumes, practice job interviews, and help them make contacts that may lead to a career. No meaning? All the people starting their engineering career who I helped would probably disagree.
"Hobbies become boring and social lives dry up." Hah! I have trouble fitting in the activities I have scheduled with my friends. Most are still working, but that just means getting together on the weekend or for dinner after they finish work. Hobbies become boring? I am fine-tuning a piece of music I've been learning on the piano so I can perform it. The more I play the piano the more fun it becomes because I can play better music.
"People get bored and often the money runs out too fast. " - Hah again! I was bored all the time at work. Since I FIREd? Maybe 5 minutes in 3 years. Maybe. As for the money running out? I have nearly $1M more than I FIREd with. This year I had one of the best years of my entire life. I'm happy, fulfilled, and want for nothing. Yet even so I spent under 2% of my 'stache.
I'm not saying this to brag. I'm pretty ordinary around these parts. Honestly when I read the amazing things that people here are doing that's one of the only times I feel jealous at this point of my life. This forum, and the Post-FIRE subforum in particular, gives me insight into people living an even better Post-FIRE life than I'm living. That provides motivation for me to do more.
In another post you wrote, "We have precious years of being young." I couldn't agree more. I had a decision to make when I was 42. I could spend my time in conference rooms in endless meetings, sitting at a desk staring at planning spreadsheets, or I could pursue all of the fun things, challenging things, fulfilling things, and wild ideas that life has to offer. I decided, as you wrote, that we have precious years of being young. I have made the youngest years of my life after the first 42 exploring a teeny-tiny fraction of the wonderful things this world has to offer.
You have a choice. You can continue to spread your mistaken ideas about the dangers of FIRE and lament missed opportunities. Or you could take a new look at the opportunities still available for you to chase, and the dreams you can still fulfill. Your choice. If you choose the latter you have a whole group of people here who have tried to help and many who will continue to help. Engage with us on what's still possible for you. As someone wisely said, "We have precious years of being young". What are you going to do with the next year of your life, which is the youngest you'll be from now on?