What does "hair trigger adjustment" have to do with anything when the hammer is down and the revolver is in the holster?
I'm not sure... you'll have to ask Mr. Earp about that, as he's the one who said it, not me.
And didn't Earp once suffer an accidental discharge when his Colt fell out of its holster while he was sitting in a barroom?
Yes, he did. Which means that he knew from first-hand experience how important is is to leave the hammer on an empty chamber. Experience is an amazing teacher; I had a chain-fire happen to me once - I've learned how to avoid them.
Stuart Lake also got the "Buntline Special" story rolling--and folks are still trying to sort that one out.
Not sure what this has to do with the question on hand... unless you're implying that the statement from Wyatt Earp was a figment of Lake's imagination? I'll admit some of the stories in the book are possible exagerations, but the section quoted was in Earps own words; an old-time gunfighter sharing some of the lore of the past.
It's a very strange thing when people insist on arguing against something as vital as personal safety. You might as well argue against wearing a seatbelt. The odds of my being in a car accident are fairly low... in fact, I've never been in one. But that doesn't mean I'm not going to get creamed the next time I go out for a loaf of bread, so I wear a seatbelt just in case. Why take chances?
Accidents happen all of the time, whether in a car, or with a loaded gun. Both need to be treated with respect or you're gonna wind up dead. Or someone close to you will.
You can pooh-pooh the warnings if you want to, but ask yourself this: is there a real possibility of the worst happening, or am I certain that it will never happen? If you can say, for sure, that accidental discharge will never happen to you, then keep on doing what you're doing. Otherwise, maybe there's some truth in what people are trying to tell you here.
I use the "4-second prayer" rule. If what I'm doing has the potential for eliciting the "Please, God... let me take back the last four seconds!" prayer, I like to be very careful in the way I approach it; 'cos no one, as far as I know, has ever, ever gotten those four seconds back.