I think the reaction has two sources, one is a legitimate fear of marginalization through appropriation. The second is that people don’t like the idea of body dysphoria causing people to be happier without certain working extremities. It’s “weird and icky and gross”, as one person I’m following put it- the exact same reasons people use the exact same arguments (that it’s not a real problem, that people with dysphoria are appropriating from a marginalized community, concern trolling for people who undergo surgery to get rid of dysphoria, et al).
