This situation is not the example to use for replacing police with social workers.
The wife thought he had shot himself and reported that he was acting erratically with a cache of guns. That sort of report should always draw a police response, not a social work response.
Then the guy refused to cooperate with police or come out of the house for several hours. [ETA: this is a place where a mental health professional could have been useful, but not alone or in lieu of a police response.]
The criticisms I have here are limited to the final few moments where the police officer decides to aggressively tackle an obviously unarmed man to the pavement when he was not threatening anyone. LOL at the assertion that Brad's cutoffs "could have easily concealed a firearm". OK, no, and also he was surrounded by about 10 cops with assault rifles and body armor. Whatever peashooter or pocketknife he theoretically might have been concealing in there was not a threat. They could have continued to talk him down and get him in custody without violence, but I suspect that Officer Bodyslam was getting tired and impatient of being out in the Florida sun dealing with Brad's bullshit. Understandable, but does not justify violence.
There are probably hundreds of situations in America every day that could be handled better by mental health/social workers than police, but this isn't one of them.