Oh, you're not a trigger-puncher, you say? To see just how badly you punch your trigger, the next time you're practicing with a buddy, trade releases. On your first shot, whether the release is set light or heavy, you'll punch it. Badly. Don't try to shrug this off as a reaction to an unfamiliar release. You punched it because that's how you shoot.
Now try this with your own release: Increase the trigger pull to the maximum tension and shoot it. Undoubtedly you'll flinch, lurch, and probably squint your eyes at the point where you expect it to release the arrow. Like detecting flinch with a rifle trigger, recognizing the problem is the necessary first step to correcting it.