Why doesnt riot use champion concept section of board for people choice award

Im very interested if champion concept is every use or just there so you put ideas fot people to read because im confuse why riot doesn't use some of those ideas is because copyright laws or there afraid lawsuits i dont know, Either way im here asking any riot employee to atleast do people choice award for champion in this section of the board, where the community comes up with 100 champion concept and community vote for it until become top 50, 30, 20, 10 to top 5 one these champs will get to be in game but this is one year event so every year one of Champions in a rooster was a PCA I don't know if these rules are ok or reasonable Rules:

1. champion must has is own concept art ( this so riot has idea how your. Champion features and body movement will be like in the game)
2. concept art and details for passive and all four abilities (idea for how abilities will react in the game to each champion and affect the out come of the game)
3. lore concept must explains champion backstory, region and reason for going to field of justice( easier for riot to create champion behavior, voice and interaction with other champion)
4. list all quotes, saying and character sound for attacking, moving, recaling, respawn and death These rules seem to be quite easy to understand, please tell me if this good idea or just dumb because it seem sad to waste so much potential in champion concept section