why can't you play 1vs1 or practice tool

Its called "PRACTICE TOOL" how can you even practice on it if you don't have a real target make it PVP at least 1 vs 1 so you can practice on your aiming now the only use of practice tool is for youtube videos (biggist warwick jump fastest jhin 10000 Hp chogath) i mean wtf? why does it even exist? bots are so stupid to practice with at least give the cheating tools for the create of the game and he can decide if he wants to give the other player the ability to use the tool or not or maybe apply it on him. Also why is not all the champions has bots?
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