You forgot the third category of art posts on Twitter:
People complaining about NSFW art to get likes.
Just shut up. I'm tired. This meme isn't real. You don't just draw boobs and then magically get a billion likes. NSFW art is real art, and it doesn't make you a sell-out.
I have the distinct memory of being in Japan at like age 15 in the Shibuya crosswalk, expecting to get lost in it, and just staring at the one other foreigner of similar height across the street from me, and nodding.