Reworks are atrocious

What is the point of even playing this game, and learning a champion when Riot can just freely change the entire champion at their whim?

Everyones champion, at a moments notice, can be turned into an entirely different champion at any time Riot Games wants.

How is it possible this is a "e-sport" or a "competitive" game? It would be like playing street fighter and Ryu losing his fire ball and uppercut, and blanka no longer being able to do his roll move. Or how about super smash brothers where a character can be totally redesigned? How on earth can people invest time into champions knowing they can be flipped on their head out of no where?

Or how about playing starcraft where a patch could take away hydralisks ranged attack since the game company wants them to meele now?

Riot is shitting on people who practice/learn, and master champions. I understand number changes, but to completely remove an ability/replace, or change how something fundamentally works is garbage.