No idea why, (the "wrong" public Wi-fi?) but my appeal was granted and nothing was fixed.
Now I can't contact anyone, and the appeals page falsely claims that my account is in good standing and refuses to operate.
When I went looking for help from a throwaway account that I made many years ago for resume reviews, the exact same thing happened.
So at this point, I only lurk occasionally, because I'm not going to go through that social hell again, and it sounds like moderation failures have only gotten worse in the years since.