if i were running a fanzine and somebody messaged me like “I don't necessarily feel comfortable joining this zine if stuff like X/Y or W/Z is allowed” i think i would respond like “thank you for your interest; i highly encourage you to take the time you would have invested in this zine reading actual books”
there are people for whom “comfortable” representations in fiction have never existed
there are people for whom a “comfortable” representation in fiction never could