hot take but i wager that a significant part of why FOSS isnt more widely used by the average person when it comes to things like social media has a lot to do with programmer culture.
Loving the positive outlook!
I do think it's worth noting that FOSS is not a monolith, and there are plenty of progressive and inclusive communities.
Especially with new projects, it's common to see codes of conduct being enforced, and the ejection of toxic users complaining about the status quo being challenged.
Those siloes are going to take a while. The biggest thing for me is replacing G Suite - your average user isn't going to know how to administer NextCloud