Nah it’s not furries. It is just the boykisser meme that is often made to call out a person that may or may not be in the closet and mock them. It mostly conveys itself as rage bait / just being annoying.

So if the krita mascot starts saying stuff like that, that’s a valid reason to not continue using the software.

I do like the boykisser meme, but I’m just playing into the joke