Possible ''fix'' for tanks?

I'm personally on the side that thinks tanks should be tankier as they can melt really fast in teamfights, yet, i can't ignore that the main complains i see people pull when complaining about tanks, is how they're getting dived by tanks so easily.

What if towers dealt %health damage? It would make diving riskier and make dives from tanky champions less oppressive, while opening better/stronger itemization possibility so they can survive better in teamfights (if needed)