HOW TO MAKE TANKS MORE BALANCED!

OK, im sure many of you have come to the consensus thats its pretty BS that a character can build no damage items, be hard to kill, and even soloing your fighters, assassins, and adcs just a couple champs off the top of my head for example, amumu, malphite, naut, and mao all deal a significant amount of damage and are nearly impossible to kill in a team fight (yes that is their purpose to soak damage but not to deal it). and something that i've noticed that nearly every meta tank has is percent health scaling in their abilities, now let me tell you why this is not ok and this is why tanks are broken. When a character has a significant amount of defensive stats and deals more damage based off of being more defensive, it is inherently busted because not only are they harder to kill but they also deal more damage the harder they are to kill. Which logically makes no sense and in fact provides unhealthy and almost annoying play styles making tank teams feel nearly impossible to win against unless you play the teamfight way way WAY better than the tank team. To conclude tanks should not deal damage, yes a little but not as much as they do now. How to fix it? Remove percent health damage from tanks weather it be enemies percent health or their own health.