Why do turrets even exist?
They don't hardly do damage. They are bugged out of this world. ( They don't target champions attacking you well within the range of the turret.) They are ridiculously easy to destroy.
So the only purpose is to hold of minions and even that they suck at.
ex. I had a riven sit under tower for 7-10 seconds attacking me and the turret did no damage to her.
If you intend to look at my game vs riven fine - i know she was fed - before she was fed she had 1/3 ~ health and it took 2 turret shots 1 e , 1 q and 3 basic attacks to kill her under the tower. I think this was lvl 8- 10 i dont remember