Heroes/Braves have been screwed over since the concept of JRPG has been born. Dragon Quest which created the Hero/Brave class concept DQ I has the player character the Hero basically travel alone to rescue the princess, and defeat the Demon King and was not given help whatsoever. It worked out for him though he married the princess, went to make his own kingdom had three kids, two went off to make their own kingdoms, and his grandchildren then defeated an evil god in DQ II.
Of course for those confused, the Demon Lord offer the Hero of DQ 1 half of the world which you can take but you wake up in a inn as if nothing happened. Dragon Quest Builders 1 focus on this where the Hero took the offer, and the Demon Lord tricked the Hero, so the Builder now has to save the world.
Dragon Quest: Adventure of Dai a manga also brings up having loads of power is not a good thing, it plays into Dai's background.