Point of a Tower?

Truth be told this has prolly been brought up before, but I didn't see it, and being newb or such does not offend me like most so , figured I would just start one .

What is the point of a tower? I mean , it does hardly ANY damage to anything short of a creep, Ive seen Vayne tank towers continually in ARAMs, seen Wukong walk under tower and taunt , seen a Garen with NO Armor basically dance around the tower for a good 25-30 seconds and walk away with 3/4 of his hp still. So whats the point?

The towers offer NO protection, nor a deterent reason for people not to tower dive, even at low levels, 6 to 9, as long as there are two people odds are the kill is assured. In a recent Normal's game watched there jungler do nothing but grab tower aggro so lanes could walk under and just get kills.

I recall playing back when if you dove a tower, odds are you were gonna get stomped, people walking under towers without at least someone with Armor was unheard of, now a days its grab your giants belt and go a tower walking, since they do jack damage. Obviously if you stand under then for 10-12 shots it might get you low. But lets be honest, when the tower AI isn't ignoring the person hitting you for creeps, or once i swear it didn't even SHOOT at the guy who dove tower solo until he was behind the tower. Its just something they need to destroy to move to the next one.. might as well make it a house with a old man on the porch screaming at the kids to get off his lawn, has about the same effect.

I a know what your gonna say "they must have Armor in there runes then" true, but wouldn't you think that should be taken into account when adjusting tower damage? ADCs should never be able to "tank" tower shots, same with mages i would think unless they opted for at least some armor. As it stands right now, the only point to a tower is to hold off creep waves in my eyes. (and it doesn't even do that very well) When before it was a defensive line, i mean nerf the HP if you like, but please, for the love of all that is holy and good , make the towers do some DAMAGE again.

Rant over, I get that i might been as "skilled" as some of you, and i might not be as "pro" as others, but at the same time, I don't suck at the game either. So I can tell when its my mess up that i died, when i zigged when i should of zagged, and when something just does not seem right.