FOSS is punk
A music genre with roots in the 1970s and a modern day software trend aren't things you would usually equate together but the rockstars behind them are remarkably similar.
"The punk ethos is primarily made up of beliefs such as non-conformity, anti-authoritarianism, anti-corporatism, a do-it-yourself ethic, anti-consumerist, anti-corporate greed, direct action, and not 'selling out'." ~ Punk subculture, Wikipedia
The core tenet of punk, at least as I see it, is doing something because you believe in it. It's also doing it because you're passionate about it and because you want to be part of something. And, crucially, it's about doing something despite the lack of monetary gain (or even in spite of it, al a Steve Albini, may he rest in peace).
Creating and maintaining Free Open-Source Software is often hard, thankless work done from a place of love and altruism. People start and manage FOSS projects because they're trying to create or solve something which they believe should be publicly available for everyone to use. Many of these people spend large amounts of their free time maintaining these projects and a lot also invest their own money into them.
It's the ultimate DIY aesthetic. Someone with knowledge and impulse decides to do it themselves instead of waiting for Big Tech to solve it for them.
Of course there are "sell outs" who allow themselves to be taken over by giant corporations (GitHub) and bad actors who take advantage of FOSS maintainers for malicious reasons, but on the whole I believe FOSS represents the best of the human spirit. Communities putting in time and effort to create the building blocks of a free and open internet, without restrictions and devoid of the usual forms of judgement and prejudice.
You only have to take a cursory glance through the many Mastodon servers to see the wide variety of people keeping our online existence in operation. Within these communities there is acceptance, so long as you share the core values of anti-corporatism, a do-it-yourself ethic, anti-consumerist, anti-corporate greed. I can't think of a situation more similar to the punk subculture.