It doesn't guarantee safety for everyone but they're job is to use force to control people IF needed. its not my job to wrestle an out of control pt.
To a point, I'd say it is your job/duty to "wrestle" with an out-of-control patient. Again, lets remember, we're talking patients, not a$$holes. If you and your partner(s) have the means and strength to physically control a patient, you should do so as safely as possible, but backing off because you think its not your job to get physical could easily be argued to be a dereliction of duty in many instances. (To be certain, I'm speaking more broadly than just overdoses or intoxications.)