Man im so glad to see that tanks still do to much damage.

There are so many things about tanks that for the longest time have needed to be nerfed. and i dont want to see there tankyness nerfed. no that's what there supposed to do. Im talking about their damage. If a champion build full tank then it makes a lot of sense from a balance stand point that they dont do a lot of damage right? then why do tanks have access to items like ice born gauntlet, thornmail, deadman's plate, and runes liike grasp of the undying, and shield bash. why do all these DEFENSIVE items/runes increase a tanks DAMAGE output. like its not that hard to understand that a champion who has built nothing but defensive items should NOT out damage someone who has built full damage. A tank should be the one who takes the enemies attention and withstand as much damage from the enemy as they can while their team does all the damage for them. A tank should not be the one to go in and 1v3 the enemy carries. Lets take a look at sylas for example. They released him to be an AP damage mage/assassin but he was pretty bad when he first launched. now sylas is pretty broken at the moment but not because of the build he's supposed to go but by going tank. We have seen this so many times before with tank ekko, fizz, and akali. You would think that after 3 or more times riot would take a look at the tank items they would buy and still allowed them to do mad damage. So riot please just nerf/remove all the damage that is provided by tank items/runes already.