There’s only a few people on this planet that I allow within three feet of me. So let’s talk 5 feet and beyond and yes I would use a flash front sight. The target is always in focus when using a flash front sight, that’s the idea, when you see the front sight “flash” upon the tgt you used a controlled trigger pull to place rounds on target. I also temper that with the reality one may have to make a “high value” shot and if so the focus would change back to the front sight.
TS
BTW, I do hope you do not allow anyone within 0 feet of yourself unless you are wearing a condom…