OK, you don't really know what a hero is, do you? Neither, apparently, did the person who wrote that book you lean on so much.

The Hero is pure. He is the pawn of Fate. The Hero must complete his task and die. The Hero is a sacrifical victim. He is the Oak King, the Vegetation God, the Solar God, the Rain-bringer. Whatever it takes in any locality and climate to maintain the cycle of growth and decay on which life depends.

The hero who survives his task is not a hero, but merely a protagonist. Anakin Skywalker/Darth Vader was a hero, his children were protagonists. Harry Potter is not a hero, Elric of Melnibone is. Frodo Baggins sacrificed a surrogate - Smeagol/Gollum -but was still forced to leave the world, and so on.

Villainy is the misuse of power. Sauron desires only domination, and like any dictator, he teaches his slaves to believe that it is The Other that threatens and oppresses them. With the power of the Infinity Gauntlet, Thanos could have created a Universe of inexhaustible resources, but instead chose to kill trillions, simply because he could.

None of this has a bearing on real life, except when people are stupid enough to confuse fiction with reality. Authoritarianism is simply the natural and inevitable - and to a degree necessary - way of governing humans now that we no longer live as we were evolved to.