I had a point by point response, but I don’t think perpetuating this discussion is productive, so I’ll just leave you with the friendly advice that adopting a judgmental, nearly religious fundamentalist, and authoritarian approach to FOSS feels like it violates the spirit of FOSS itself and will likely be off-putting to even other FOSS enthusiasts, much less anyone you want to convince.
I can understand privacy concerns, but I feel like it’s inevitable that LLMs will be used to make lots of decisions, some possibly important, so wouldn’t you want some content included in its training? For instance, would you want an LLM to be ignorant of FOSS because all the FOSS sites blocked it, and then a child asks an LLM for advice on software and gets recommended Microsoft and Apple products only?