Huh? The usual pattern is that experiments belong to a user and then they graduate to having their own org iff they grow enough maintainers for that to make sense. How is that toxic or self-centered? It's just like "here's a place to do low-stakes experiments in public view". It's not particularly about ego or selfishness or whatever.
“Organizations” didn't exist until GitHub was already popular and entrenched, and it got popular and entrenched by centering the person developing the code instead of the code that was being developed: https://github.blog/news-insights/introducing-organizations/
And they weren't free until 2020: https://docs.github.com/en/get-started/learning-about-github...