I have never worked for a company where the crew couldn't initiate evacuation, but ONLY if the situation was CLEARLY CATASTROPHIC or after a severe incident where the CC was unable to get in contact with the FD.
For anything else, it is the Captains decision, and there might very well be factors internal or external that the CC don't know about, but that would endanger evacuation (eg running engines, fire, other aircrafts ect)
But of course, we don't want to be too harsh to our crew for taking initiative
If the Captain hadn't been informed / consulted and the situation was not clearly catastrophic, then the SCCM is to blame for all injuries. The Captain has been bypassed and had no saying, and he might have chosen a very different and better informed decision had he been consulted about the situation.
Poor decision to disregard the Captain and give a **** about CRM, when there were time to make a proper decision by the right people. The Captain might only have needed 5-10 seconds to make his mind up, and injuries might have been avoided completely.
Aldi seems like a more safe place to work for some people!!