Consider: a police officer and an EMS worker are dealing with someone who is difficult to subdue. The police officer -- who does not have the expertise to know whether it is a good idea -- requests that the person be injected with ketamine. The EMS worker -- who does have the expertise -- does so, knowing that it is a bad idea.
What most needs to change here is the EMS system.
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EDIT. I guess I mean to say that the people involved here (as opposed to the article) are concentrating on the wrong thing. The police are the ones that have changed their policies. But it seems to be the EMS system that has the more serious problem.