Damage should never scale off of defense

Hi, I'm your friendly neighborhood ADC. If I build tanky items, my whole team is gonna spam ping those items, because I'm supposed to be my team's main DPS. I guess I just have to go Glass Cannon, then.

Hi, I'm Volibear. I built myself five Warmong'ses and a Cinderhulk. I know you're trying to kill me, and that's quite saddening. Munch! Bye bye, somewhere around 1500 of your health!

Hi, I'm Cho'Gath, Volibear's deformed twin brother. Munch!

Hi, I'm Warwick. I know I'm building full tank, but it's okay, because I bought myself a Titanic Hydra. I know it would take the slightest amount of skill to use a more damage-oriented build, such as Full AP, but you see, I'm a mindless sociopath, and I find joy in walking up to people in a straight line, taking very negligible damage, and one-shotting the glass-cannon ADC.

Hi, I'm Rammus. I know you must be shocked that I'm engaging in conversation, but excuse me as I activate my 600-armour death stance and allow you to just end your own life now. Go on, touch me. I'm waiting.

Hi, we're Riot Games. We believe this is okay. But let's release the Spear of Shojin onto the PBE, to allow squishier players who mainly build damage to be rewarded with some defensive stats. So now the shoe is on the other foot.

Hi, I'm Warwick, back again. I don't want the enemy ADC to be as successfully brainless as me. I don't want to actually have to think in order to outplay anyone. I'm sorry, but this item needs to go forever.

Hi, we're Riot Games. We are so genuinely sorry for mildly threatening you, Tank-Item-Builder. Please, continue being the actual uncontested cancer to society.

Thank you, Riot Games; I shall.