Dara,
Respectfully, what professional training have you received? Has it included resistance from an opposing force fighting for your carry gun full force?
It's about more than a "quality holster" though. You could have the best holster in the world and that won't save your life in a fight. You need to train with your gear.
Can you elaborate on this? I've seen soft loops sheer apart during FoF and officer's lifted off of their heels while a subject is yanking their service pistol with all their might. If the holster does not fail during this, I cannot conceive how you do not think it's part of the equation of things that lead to the good guy's/officer's survival.
A good holster can also be different for anyone.
The term "good holster" means a lot of things to a lot of different people. To most, it means something cheap, and comfortable. Most of those attributes do not flow over to a tough holster that works well during FoF, sadly. I don't know of any holsters that are tough during a FoF class that I would use with a suit, for example. That said, I'm not wearing a Glock 19 AIWB in a suit most likely, for example. There's always trade-offs.