It's because they are true believers, that's why they just couldn't tell their fans to fuck off, that would have diminish the plight of the poor negas so instead Kovack and the other chick had to make some genuinely embarrassing apology post that not only didn't quench the fire but even started a witchhunt for the other VAs who will take it without doing anything because these people are just cowards.
This is the problems of the TADC fandom, the people involved with the show it's scared (and in Goose case just straight up hates it) but at the same time many of them come from fandoms so they can't quit their dopmine mine just like that so they tried to met halfway by trying to act nice everytime their fans overstepped. Well, they did and still got treated like this, so what was the point of being nice to people like that?
"Raise crows and they will gouge your eyes out" an old saying goes.