Well, DPC years ago wrote that he's into incest and later in Q&A 2022 he added his favourite VN was Timestamps, so he probably doesn't insert it in his VNs just because Patreon would have banned him.
Or he is aware that most people not into that shit
and if, I remember right Tommy literally call the " player " Retarded for even suggesting that he wants to Fuck Josy.
So, no , probably not just because of Patreon rule, but because he not want it.
and even in his previous game which was before Patreon became more racional this was not part of it, unlike with some other developer, who did their previous game with that in mind, his games are not designed it from the get go to contain this element.
and btw, this is one of the positive thing about him.
So we can drop this conversation all together