I've been shooting SA revolvers most of my life, and don't have a lot of experience with semi-autos. One thing I have learned is:
You don't need your left thumb for cocking when shooting a semi-auto, so for God's sake, get it down and out of the way. Don't ask me how I know this.
You don't need your left thumb for cocking when shooting a semi-auto, so for God's sake, get it down and out of the way. Don't ask me how I know this.