I don't even know what font I'm currently using, though I put some thought into choosing it at the time.
Some of us just care about what our fonts look like. I'm loving the configurator with Iosevka; yes, I'll likely spend an hour tweaking a custom font, but after that I'll just be done and move on.
There's no "flex" if I never even show anyone my dev environment or talk about what font I use. I think you're experiencing selection bias in thinking that only people who flex care about their fonts. ;)