How long did it take you to arrive as a Limited Division Master Class Shooter, Sir? Surely a bit more than a couple of days of class.
Being "threat focused" is probably easy for you, because of the time and effort you put in to get to where you're at.
Now I'm not a Master Class shooter. So don't take my word for it that what you're saying is a lot easier said than done.
Let's see this what the 8-time USPC Champion and 3 time IDPA Champ says about this matter
"It's a very very difficult thing to get yourself not to focus on that dot and instead look where you want the bullets to go."
It takes a lot more time to master a red dot than you guys are letting on. Most people aren't Master shooters.
This is not a question of "Which one is better (Optic or Iron)" -- this is a question which one takes longer to learn.