I guess what you see is what I see as well, even if our interpretations don't align perfectly. Nothing worth arguing just for the sake of philosophical ramblings.
The part about the alt-text, though. I saw a mention to it one day and didn't realize it became a issue. Mastodon and the fediverse suffer from trying to find an identity amid the decentralization. I think one of the reasons people are not fan of beehaw is that it has its own identity. People say they are part of the fediverse, but it's more accurate to say they exist in it.
And you're right about the options. We might not want or be comfortable moving, but we can. And, here at least, you're not isolated when you go from place to place until you find the one that's good for you.
Thank you for going deeper. I see now the issue with gatekeeping. You're right, it is gatekeeping. We can express it in a more positive way, but the point is exactly not letting in people that might harm the community. As your said, it will repel potential members that would be good additions. In the future, when the community is strong enough and is able to deal with bad elements effectively, the gates won't be that guarded.
About some things not always being clear cut, it is not that big of a issue. Saying something that sounds xenophobic is dangerous because the lack of context is only beneficial to the ones that want to cause harm. My response to the comment would be asking for clarification, but that's my privilege, there's no risk to me. Imagine if I'm the foreigner in the country and there's a growing aggression against my people. I fear for my integrity and the law might be too late to protect me. A comment saying that they wish there were more people talking the local language becomes suspicious in this situation.
Imagine that someone can't identify who I am and say I deserve to be hurt. Should I alert them I'm the one they're taking about? What if it's a whole room talking like that? What if it's ten percent of a room expressing this feeling and the rest doesn't care?
These questions are not to prove a point, but to explain the reasons for the creation of safe spaces. So we are sure the room is not quietly agreeing.
I saw a lot of comments complaining about having to answer some questions before signing up to specific instances. Not that they were rejected, but having to apply. The question is: "Are you a decent person?". Anyone could lie, but the question is enough to show harmful behavior is not allowed and that we'll not be silent just because we aren't the victim of the day.