Why not buff tower damage?

Then buff tower damage to champions, no downside this way.

And? They'd be sacrificing a lot of gold/exp in those cases.

Right now, its essentially removed as a strategic choice when more than one champion is in your lane and you have no back up.

Instead of losing gold and EXP, you lose gold, exp, a tower, and possibly another tower without any input on the situation being possible without just throwing more into their hands.

Bad laners staying under tower are going to lose either way.

Its the good laners that have 2 or 3 people collapsing on them early-mid game that are forced to give up gold, exp, and a turret or two despite doing better than the other 2 or 3 that needs to be fixed.