Even though they are "wired" into the system, console positions must be treated like any other user of the TRS as far as security goes. Depending on the permissions given to them by the administrator in the UCM (or provisioning manager in starting in Astro release 7.13), they might not have certain capabilites like the use of certain talkgroups, etc.
Because of the way the system is designed, the system knows to give that specific ID priority over any other traffic on the system. All IDs on a system are assigned a priority number of 1-10 with 1 being the highest. You cannot program a subscriber (mobile or portable) higher than a 2. Only consoles can be assigned a priority 1.
The Astro systems of today, in my opinion, are WAY over-built when it comes to security and redundancy. I'm not saying it's a bad thing, but there are certain things like what you mentioned that make you wonder "why did they do that"?