To me the emphasis on the FIRE community should be on the FI part of the equation. For many people in many countries, there is no concept of "retirement". It seems so silly to me that people would go and say "I'll work really hard and do all this stuff for 40 years so I can sit around and do nothing for another 30 years". What's the point? It's unsustainable. It's like doing a crash diet - it may work for a minute, b…
What surprises me is the lack of creativity that comes from people planning to work into their 60s. To be sure, in this year of a pandemic, not working but also having a lot of other options outlawed or discouraged made for a less than ideal lifestyle. (Source: I was unemployed for six months.) Even so, the freedom to... saw/split/stack firewood when the weather was perfect, build a movie nook for my wife, go on bike…
I had a job where I could do this. On any given week I worked normal(ish) hours, but I had pretty close to full control over when and where I worked, with significant autonomy on what and how. I spent most of my afternoons outside unless I really felt like working on my project. At the same time, being at a company gave me resources, teammates and scope I would have struggled to recreate working on my own open-source projects. I had just come off a one-year break and I ended up enjoying working more than I did not working. It's a real shame that we can't have more jobs like this; it requires giving people a level of trust and autonomy most organizations can't stomach.
If I could arrange a role like that into the indefinite future, I'd have absolutely no questions about working well into my 60s, and not at all thanks to a "lack of creativity".