The Lonious Monk
Celestial Souljah
Hush
I would think the 6'10+ dudes trying to contest that shot might play a role in that but there are other variables to consider as well
Time left on the shot clock
Foul on the shooter not being called
Etc...
lol @ you listing things that every big man in the history of the game has faced to explain why these particular big men have paint shooting percentages in the 30s.
I'm not saying there isn't a good reason. For instance, maybe they play on teams with bad shooting options, so the spacing is relatively bad and those players face more resistance than others. That would be an actual reason. I don't know. That's why I asked the question.