I’m friends with a furry artist and he wouldn’t join fedi mainly due to fears from fediblocking, unhelped by how fandom drama gets in general, not just in the furry sphere, and major drama with mastodon.art using some grifter’s block list which blocks like over 50% of the fediverse.
From what I’ve learned, being friends with him and other artists (and following ones I’m interested in), a lot of creators want a ready-made audience to advertise their artwork to, which was where Twitter came into play and why a lot of them are going for Bluesky instead since it’s recreated that experience for them. It gets hairier when it comes to NSFW content, too, since some places on the fediverse are absolutely fine with it on their timeline, and some places are definitely not. Though Bluesky has popularised CWs for adult content in that sphere, some instances don’t like users posting NSFW and will request it be unlisted if it’s allowed at all.
If the creator is SFW only, they’ll have a lot of good luck using a general purpose Mastodon instance, unless they find a community that suits them better. Joinmastodon.org has a good list, and a lot of them don’t have that networking issue except with very fringe instances.