Sefaria is an amazing tool. It is also an open platform. It will be used by anyone who wants to learn from it and contribute to it. Just like a sefarim store is open to anyone who wants to come in and buy sefarim. And the internet is open to anyone with a browser and an internet connection.
The question now is what you want to do with it. If you don’t want to contribute to the source sheets, the shiurim, etc – because there are “open orthodox” and fully “non orthodox” and possibly even non-Jewish academics using it – don’t contribute. I would similarly recommend you avoid these sections of the app/site.
Even “just” as a resource for access to texts alone, Sefaria is incredible. Use it for what makes sense to you.
Or ignore it entirely.