Can we get a statement on why towers aren't buffed?

In lane phase even if you're just above 50% hp, if you get ganked you're dead 9/10 times unless you blow all your summoners and or ult (which just leaves you open again) and in all other phases of the game a tower is just being hit by a pool noodle. Like we might as well swap out all 2nd tier and higher towers for structures that do no damage but have more HP as they would extend games longer.