In my opinion, I feel that if these facilities were designed and constructed under a building permit being equipped with electromagnetic locks that are tied to a fire alarm system which will disengage (unlock) when the fire alarm system is activated (similar concepts used in LTC, nursing homes, etc) then that will provide the acceptable life safety method.
I agree with Lindsay, I wouldn’t feel comfortable relying on a person (potential human error) coming to open the door with a key to unlock the door OR what happens if the key goes missing? Chances are they are not monitoring the cameras continuously.