Again your whole argument means nothing. Riot balances based off of Plat and above and have said so consistently. That is how it should be. These are the players that are actually good at the game and are all consistently within the same skill level and know mostly everything about the game and character mechanics.
In bronze for instance, i can go kennen ADC and i promise you i will destroy anyone in bronze with any adc they pick. how do you balance for bronze when the players are so bad they can do that. Bronze is not realistic and neither is silver nor gold. I can stomp with any champion i want on my bronze smurf with basically any build. I went ADC Leblanc a couple games ago and went 17-4. Two games before that i went Tank Draven Mid and went 9-4-23. Riot isn't gonna balance around that %%%% when players are so bad that players who are actually good can roflstomp with anything. It is the same reason why Tryndamere, Fiora, YI, Heimer, etc never get substantial nerfs or buffs. They are bronze stompers but are horrible at high elo. If they balanced them for high elo they would be permabanned in low elo. Some champions are meant to excel at high elo some at low.
Kalista, lee sin, elise, jayce, gnar, vayne, ahri, etc are all champions with dog %%%% win rates in bronze silver gold but excel in high elo or Plat+ because those people know their mechanics and are actually good at the game. When a champion is stomping in Plat+ they needs a nerf, riot doesnt care how they do in bronze or silver and they shouldnt. You are the majority of the player base yes, however the majority of the playerbase sucks and they get all of their money from the LCS, not you.