Less effort = greater reward. In what world is that "fair"?

Please, enlighten me. Why can someone right-click on me and instantly kill me? No thought goes into that, no effort, no cost is involved, there's no drawback, nothing. They just right-click, AFK, and win. Or how about someone like LB or Kat, who push a button and kill you with targeted, unmissable abilities that, for some reason, halve your health. Or a tank like Volibear who builds full health and one shots you if you're not a full tank.

In what fucking world is it fair that champions who require FAR less effort, skill, knowledge, mechanics or anything have a FAR greater output in whatever it is they do? I don't understand how that's "fair" at all.