The prevalence of guns in the US means that every single police encounter is a potentially lethal one. Even if the suspect is unarmed, the cop themselves has a gun, so going hand to hand with someone risks losing control of their own gun. It makes for scared cops, understandably reluctant to go hand to hand, and lose the advantage they have.
If I lived in the US, I would tell my kid to comply 100%, no matter how unreasonable, incorrect, racist, or out of line the cop was, the time to argue is the next day at the station with a lawyer.
But knowing you‘re not gonna get 100% compliance, police training has to be better than this. The car should have been searched. There were multiple cops on the scene who should have been better trained to use non lethal force, and incapacitate the guy.
These incidents will happen again and again, until a truly 100% effective non-lethal weapon is produced (tasers are around 55 - 80% effective, from an article I read), or until the US comes to it’s senses on it’s second amendment - possibly the worst bit of legislation ever written.