Why riot doesn't nerf champions who always get picked in the lcs

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These types of champs have very static kits and are mostly just balanced around numbers which is either OP or complete shit, but in either case they're boring as hell to watch.

i find a champion played every time more boring to watch than a champion who gets played a few times for example who is funnier to watch a maokai or a twitch? i'd watch 1000 times twitch a biltzcrank or a thresh? 1000 times biltzcrank