When champions can dance and taunt under a turret there is a problem

regarding skill level no matter how good you are turrets should not be so weak as to do nothing but count as free gold while a champion is playing safe or be something to sit and taunt under while minions aren't even around. even in professional play that seems like a given, if there is a turret i shouldn't be able to rush it before a single minion is here unless I'm super tanky. I mean if i have to stun someone under a turret for more than 2 seconds to deter them from coming closer that is a huge problem! especially if its an Akali or an Ahri that can do this turrets should just be more dangerous than to just give some bonus damage to the enemy as we fight maybe it's just a fix to make games fast paced but i think you are going about it in the wrong way. Or maybe its me but as stated before no champion should be able to taunt under turrets for more than 5 seconds and be more than half HP