This is just a common thing that happens to indie artists without an established base. He didn't initially start by wanting to draw specifically gore or guro but the works he made that contained them drew him an audience that gave him support and commissions and created a demand that he shifted towards to try and make a living. A lot of artists end up drawing or specializing in things they may not be personally invested in or enjoy drawing in order to make a living.

Then in some cases that initial crowd attracts the attention of more "normal" or mainstream consumers who inevitably shift demand to more normalized content. I can't even tell you how many artists started by drawing works and commissions in stuff like guro or other fetish related material only to shift to making more normalized stuff as their patreon etc. grew. It's just them trying to fulfill the demand of their general audience.

I've been following hentai since the early 2000s and I've seen so many artists that were tiny when I first started following them turn huge and none of their content ever kept the same themes, fully.