The first guy that appears with a "sky mending stage" or something like that, is an old, REALLY old dude, whom gave YEARS of training to advance. Then MC goes to a school and every other kid has that. The power inconsistency is something hard to ignore, the bar is raised too often and right when it is raised, there is someone above it that should be something uncommon, but the MC will catch up and then the bar will be raised again, there will be plenty of danger again because it will repeat the last obstacle.