The big difference here is there is already this "learning curve" about the whole fediverse that people were struggling with that many of us wrote blog posts and had toot chains we'd forward explaining how this universe works. Adding in links and screen shots and templates for how to submit a bug...

...I hate saying this but the vast majority of people are just lazy. It's not a culture issue or not something too difficult. People like to complain and not put in effort to things. People expect others to do things for them and don't get that free comes with a cost.

FOSS isn't really that small, it's just that most people don't do any type of investigation into what they use for technology. Much of what you use may have a for-profit company in front of it but huge parts of their products are open source andnyou can directly influence the products by actually engaging the projects themselves.