It could stem from the group mentality that is central to modern Japanese culture. If one is bad, all are bad because they are all one group, not a single individual. I understand the part about having it exclusive to Japan, but some Japanese developers do not and some that do understand are of the impression that we westerners wouldn't accept it. It's like their abundance of loli games, there are many westerners who don't like it and some who would love to see that stuff banned entirely because 'think of the children' crap comes into play as if the characters in those games are real or those games lead to real crimes with real children. This is why we westerners can't have nice things, like JSK games, because other westerners have given rise to a view of the west that is not in our favor and sites like Twitter make it much worse.
It is, especially for people on a strict budget like me. He does have demos, but they aren't playable with little to no skill in reading Japanese. There are some people who don't have that skill, but can speak it and understand it by ear, again like me, but that skill doesn't help in an entirely text based dialogue game like these. I would set up a separate fund specifically to buy JSK games if I could actually play them from official sources, he's more than earned my money, but as it stands, literally the only source allowing me to play his games right now is the source he doesn't like, this community.