It's mostly about the service's audience. Discord is a huge trans/queer/etc. hub. If Discord were X or Instagram etc. it wouldn't matter. Users of Discord are, as a group, more likely to be antagonistic to anything that could be transphobic or racist than the general populace. (Whereas they don't care about disability rights, which is why people with medically delayed puberty aren't a concern.)

A tactical observation more than anything else.