Where is the skill required in using Illaoi?

Do I need skill to counter her? Yes. Does she need skill to automatically spawn tentacles and E me to death which spawns even more automatic tentacles. No. where is the skill in playing her?. because there is a lot more skill going into playing a champ like tahm kench. even though a lot of people consider him op. Why does illaoi has the 2nd highest base damage in the game? shes a tank. she has no mobility but why she needs it? she s basically a another version of heimerdinger. you go at her. the tentacles rape you. and they heal her. they do more damage than you do. her E makes you useless. and all of that is button mashing. no wait the tentacles don't need anything they just have their own mind.