I don’t think the "your Facebook account gets banned" aspect is an issue. You don’t need a facebook account anymore, but a Meta account instead – same company ofc. So if your actual issue is Meta being behind it, that changes nothing and you probably shouldn’t buy anything from them.
But I’m not sure if there’s any headset that doesn’t require some sort of account at one point, even if it’s just a Steam account.
I’ve been on basically that exact same journey. I made a little iOS app that uses rss feeds and the iframe player to play videos: Unwatched for YouTube (just released it two weeks ago). It’s also open source, if you have any specific questions let me know.