Towers need a buff, and they need one now

The following has happened to me in 4 recent games.

I crush my lane (3/0/0 and up 25-35 CS) and then there jungler comes, and I die, okay, that's fine, I should of had better map awareness and what not.

What I am not okay with is that just the top laner and jungle with two minion waves at 7-10 minutes, can 100-0 my tower and I don't have a lane anymore.

What is the reasoning for the tower being so frail? I want an answer Riot, a good one.

A reminder: One super minion wave can destroy both nexus towers, which is 100% ridiculous.