Epic will never allow that Pandora's box to be open, they know doing so will be like Youtube openly endorsing porn videos (Don't lie, we all browse anime clickbait to get doujin sauce).Subverse appearing on GOG also make a shift on GOG accepting adult games. If the "anti consumer" store "Epic Games" had allowed adult games, I'm quite sure it would been available there as well. Following your narrative then every game sold on GOG that you also find on Steam would equal being a failure, which clearly isn't the case. In the case of CDPRJ, why would anyone buy ANY of their games when they all DRM free on gog right?
Especially when you have the biggest game with a huge fanbase played by minors, it is already going to a hard no even after the controversy wtih itch.io