I totally disagree with that kind of rationalization. If you go by the four rules, you will have already made the decision to fire before your finger ever touches the trigger. Don't count on a harder trigger pull to save you from shooting at something you shouldn't be.
As for wheel guns, I have no use for them. I'll take my Glock 23 with 13 rounds any day. And if I'm out in the woods, I can push 40 bullets out the barrel of my SA XD45 in less than 30 seconds. Try that with a wheel gun.
You can disagree, but it is a sound principle of being sure of your target. abrupt waking up can cloud thinking and judgement initially - if you want to just shoot first and ask questions later - your call. But that extra resistance brings quick clarity of thought.