Turret FB doesn't stop pro games from snowballing and makes normal game snowballing even worse.
In pro play having a 1000 lead gold in 10 minutes (easily attained by 1 kill -> 1 turret + waves) is already a 70% win rate for the team that has the lead.
Adding turret FB doesn't change any of the incentives for getting that first turret; lane swaps are already risky due to this.
In regular play it's made the snowballing way worse than it used to be.