Turrets are just too weak mid to late game

Turrets should be a force to be reckoned with. It feels like that late game, turrets do peanut damage and it is extremely easy to just tank them post 15~20 minutes. A team should have to work together to take down the inner turrets, not just one huge tank and the adc. Turrets have lost their meaning, and are not really an obstacle, especially since turrets guard your inhibitor, which is a key objective to winning/losing the game. I would say don't let the inner turrets weaken late game. I don't think that it will make the game that much longer. This will make it a bit harder to just have a 2 person wrecking crew.