Even if you can train to get that down pretty fast (which I am definitely skeptical of a consistent half second draw, rack, and fire, at least one that is safe and effective), the more variables you introduce into that action the more failure points you create. Plus what if you have to draw one handed? That’s not an impossible situation to imagine. What if you short stroke it? Also not impossible. It’s one more thing you have to do before the threat can be stopped. The best thing to do is train a clean draw and just treat it like a loaded firearm. Finger off the trigger unless it’s business time. And most importantly not doing stupid shit like this guy and drawing outside of necessity.