I don't carry without a holster, but I no longer have a handgun suitable for doing so, either. In defense of kraigwy and others who make a considered and well-informed choice to carry in that manner, there is a whole heap of difference between the triggers of various revolvers and pistols. When I had a 642, I occasionally carried in that manner, but I wouldn't consider doing so with my Glock 26. Understanding the capabilities and limits of a given firearm seems to me to be much more valuable than making blanket statements.
My concern with the story in the OP is that it leaves the appearance that the officer was either misinformed, made poor decisions, or was too casual in his considerations and handling. I have a hunch that this may have been a case in which gun handling became so routine that it became thoughtless, which is something we would all do well to guard against.