Why do people complain about tanks and ad itemization?
tanks and ads are what wins games. You have to be able to take down turrets towers and the nexus to win. adcs can kill turrets kill people kill jungle objectives all the while never needed to look at the little blue bar underneath their health and tanks can stand there faceroll to cc the enemy or stand and do nothing in front of the turret(doesn't help that riot doesn't just make turret do health % based damage) while ads do their work. Ap nontanks can only do roughly 2 things, kill enemies and some of them can waveclear decently well to really well. so items don't really matter all that much because everything an ad needs is geared towards winning the game while aps can only slowly crawl to victory by doing 2 damage to the turret per second.

, and
turrets can actually attack structures.