I am wondering what the difference is in re-holstering your revolvers and moving. someone may have loaded a 6th round by mistake and have a non transfer bar revolver with a live round under the hammer. I think, loaded or not, if the gun is holstered and the trigger is covered, it's a pretty safe gun. Other than the Sig P320, I have not heard of a gun going off while holstered.
I am not saying the rules should be changed, just pointing out the fact that in CAS it's okay, but not in WBAS?