Their guidelines say you shouldn't keep responding to someone who says they don't want to keep talking. So let's say someone uses a slur that not everyone agrees is a slur, like the R word. I can't downvote it, so I report it and reply "no slurs". They respond "I didn't use a slur and I don't want to discuss it with you". Well now it's down to the moderators to remove the content, and if they don't agree with me or they aren't educated then I can't do a thing about it.
Back on Reddit people used to use my disability as an insult all the time. I'd downvote, report, and comment. I'd pester the bigot so they'd learn that using slurs is more trouble than it's worth, and lots of times the moderators would say "that's not a slur" and leave the comment up, and then 4 weeks later the Reddit admins would come and remove the comment. But by then I'd already persuaded the bigot that using slurs is a huge hassle that only leads to trouble. I had a system. I could fight bigotry myself even though I wasn't a mod.
On beehaw I'm just supposed to trust that the moderators are perfect? No thanks, I'm an anarchist. I don't trust anyone unconditionally. It would take a whole lot of effort to persuade me that beehaw is a safe space. Because to me, a safe space is a space where I'm able to defend myself when nobody else will.