> People who want to be childless usually champion the importance of building strong community through friends and neighbors,

This describes all of the childless people age 50 and older than I know.

It does not describe the social media r/childfree mindset people I know at all. They have their bubble of friends they keep in touch with only when they feel like it but that's about it.

There's a big difference between childless and r/childfree style people, though.

> People wanting FIRE is a lot more to do with the current economy and wealth of useless or harmful jobs than kids

FIRE rose to popularity before this economy, though. It felt like peak FIRE was during ZIRP when it was easy to get a high paying tech job even if you barely had the skills for it. All the blogs and influencers made it sound so easy to just keep that going straight into early retirement as long as you continued living an austere lifestyle, which came with implied advice to avoid having kids.

I followed several of the FIRE blogs and forums in the early days but had to stop reading after they started filling up with people convinced they could retire at age 36 with $1.2 million in the bank because they they lived frugally last year and decided they could keep coasting that way for another 50 years without their lifestyle changing. I remember reading a few disaster stories from people who thought they were doing leanFIRE with their spouse until their spouse grew up and realized they actually wanted kids and to be married to someone who had a little more ambition in life. I know these stories aren't what FIRE is supposed to be about in the theoretical optimal sense, but there were so many stories like this that the forums just felt like a sad place to be.

> dont want to deal with kids

Someone has to bring up the next generation, the no kids crowd want all the luxury of having the next generation without putting in the effort or spending the money.

I think more than FIRE people should just focus on FI. You still have to do something with your day after becoming financially independent and a job is still one of many good ways to contribute to the community even if you don't technically need one. So retiring is an option but not the only one.

On the other hand it remains quite confusing that after centuries of capital achieving vastly better results than labour people still keep going for labouring as their primary strategy. Building up a strong income-generating capital base is just common sense and it is an extremely good idea to have enough that you could technically avoid working if it made sense.