Laser Turrets

So I thought id give AI Games a whirl while trying out Kalista while shes on free week, and that my headset broke, I was a 15/1 Kalista and I get it, its intermediate bots. But I sat under the turret as a fed kalista and outhealed the laser turret damage for over 13 seconds. And I only had Dorans Blade, Bloodthirster for a total of 31% lifesteal(LS Quints and the LS Mastery) My problem with this is that it happens in normal games too, the fact that its EVEN possible for an adc at all, be it a bot game or normal, to out tank the laser turret damage is pretty bad. And I meant the nexus ones, so at first it was 2, then it dropped down to one, even with 2, I was able to outheal it and the Tristana Bot. To me thats a bit rediculous.