Please elaborate, would this also include rear seating in vehicles?
It's not that hard to understand when the pistol is practically touching the left leg of a passenger in the OP's car. If that person is a prohibited party, and there is a firearm right next to them, it could be a big problem if stopped. As for back seat passengers, at least there would be some reasonable separation and it would be harder to make the case for "possession, access, or control".
If a firearms owner is driving around 'prohibited' persons then they should choose their friends/family better.
I just leave my gun on my hip while driving. I carry in a leather holster and have never had any comfortableness issues.
Or the guy that pulled over on the highway to take a piss, and is now a felon because he had a CCW, and because he was breaking the law, while armed, there was a mandatory enhancer (a felony) of committing a crime while armed...