The safety arguments have almost always been misinformative, and pretty much a joke. Once the gun is in the hand, all the safeties should be "off" and the gun ready to shoot. If they arent, why arent they?
DA triggers seem to only be a challenge for those who dont have the experience and muscle tone to shoot them well (none of which is a fault of the guns), and its usually the SA shooters that complain the loudest. Spend a little time shooting one, and Im willing to bet, your shooting improves, and thats across everything you shoot, not just a handgun.
If youre the least bit reasonable in your gun knowledge/handling, most anything is reasonably safe, and no matter how you carry it.
I carried Colt GM's and Commanders on a daily basis for decades, and used to find that the thumb safety had been knocked off during the course of the day, and it never once went off in the holster. So much for relying on that safety. I also had a couple of 1911's that came directly from the factory, with a grip safety that was inoperable. If you're planning on counting on them, you'd best be checking/vetting them regularly.
Ive been carrying a Glock the same exact way as my 1911's for over a decade now, with the same result. Have yet to have one go off by itself.
After being told so many times that a Glock "had" to be in a holster or it would just start going off at every step, I carried a second (empty) 17 around the house and yard for about a year and a half, just stuffed in my pants, pockets, carried around, picked up off the table "by" the trigger, etc, doing things I normally wouldnt, but still wanted to see, and never once had the trigger drop, unless I consciously and intentionally pulled it.
For the past decade or so of summers, Ive carried a Glock 26, fully loaded in a Smart Carry at work on a daily basis, in an active and physical construction industry, and never once had an issue with the gun going off.
Maybe if people actually made the effort to become familiar with the different types and systems of handguns (and actually, all firearms in general), there would be a lot less of this sort of thing, as they gained some actual experience, and actually know what they were talking about. So much of what you hear is obviously a lack of that.