And part of that is having the ability to at least handle someone physically. If two or three cops cannot control someone with physical mechanics without the need for a taser or batons, then we need a total review of the police body.
You put your body on the line and subdue the suspect. That is part of the job. A high school wrestler could have done it.
Have you ever read how some drugs give some takers almost super human strength under such circumstances. Likewise, it is not uncommon in mental wards to require large numbers of nurses or aides to restrain an unruly patient.
And that's the primary issue. Many cops these days are not willing to put their bodies on the line. Their primary concern is to complete the shift without personal injury. Police dept training promotes and encourages this attitude, since they do not want to pay for police on-the-job injuries.
Yes, they could have subdued him by piling on top of him, and risk getting bitten or scratched, and getting their uniforms ripped. They evidently were not willing to do that, and preferred beating and tasing him unconscious.
Some cops might have been willing to risk injury in order to bring this guy in alive. These cops were not willing.