afterbanginnyeah i mean dropping huge cliffs probably isn't that great for your knees but landing on a concrete surface with not a lot of snow on it isn't good
True, never said urban was good for your knees. But generally my knees hurt more from lapping park than from hitting urban since I take less hits on a urban feature than spending all day hitting rails/jumps in the park. My knees probably hurt more from hiking up the stairs hitting urban than from the impacts of landing on concrete.
I think over shooting or undershooting in the park is probably the worst thing in skiing for knees.