Is there a Rioter who can explain why there are still no nerfs to the 3 must-have tank items?

I mean if you can even call the Iceborn gauntlet nerf a few patches ago a nerf, then so be it. Iceborn Gauntlet, Spirit Visage, and Sunfire Cape are still a must-build on any champ looking to tank damage, and they can pretty much be built on ANY champ in the game and be extremely hard to kill. Why is this allowed to go on over an entire season while so many nerfs happen to everything EXCEPT dealing with tanks?

I'm honestly just curious what the thought process is, how long this tank meta is going to last, and why there is the idea that we don't need something "fresh" in this game. The choice where you must pick complete braindead champs with point and click CC while building nothing but tank items and doing more damage than assassins while being unkillable is EXTREMELY old now.

Please elaborate Rioter, thank you.