Gloves protect your hands. Gauntlets protect your wrists. So the question is really, "Do you want to protect your wrists?"
I wear shorty gloves pretty often. Yes, I want to protect my wrists but I have other reasons for liking the gloves. It's a balance. I always wear a proper jacket, helmet, and boots, but I often wear plain old jeans on my short jaunt to work. Risky? Absolutely, but if dealing with proper pants means I'll just say screw it and drive to work then I'm ok with making that concession. Sometimes I'm a lazy bastard. Sometimes I'm going straight to a meeting and simply taking off my jacket is a lot easier than dealing with proper pants.
The fact is that you've already compromised your safety by riding in the first place. The trick is to protect yourself in the best way possible while still continuing to ride. And from this perspective, gauntlets are the clear choice.
But I guess I subscribe to AGATT-light. I'm a sucker for convenience. If wearing jeans, or more comfortable gloves once in a while means I'll ride 10% more miles this year then yeah I'll do it. I'd guess that most of us don't ride as much as we want to, and we've all said "Screw it, I'll just drive." more times than we'd like to admit.