In reality over 3 years, those lines became more like a mine field. Up to and including non-sexual Visual Novels that happen to be set in school (something even pre-2018 Steam allowed). It's to a point where it feels like the one who wrote that blog doesn't even work at the company anymore and the new moderators would rather just ban it all over again. Really sucks for devs, but I imagine Valve isn't having a good time either.

I think this is ultimately reflective of America's attitudes towards nudity as a whole and their ability to communicate around it. But ultimately, I don't expect some app stores to go up to bat to challenge that stereotype, so I can't blame them for just saying "no, leave that all out". Not unlike political topics on a casual forum.