To be clear, handcuffing does not mean you're being arrested, it means you're being detained. It's not about them getting you ready to take you away. It's about them verifying that you're not a threat.
Whatever the claim was, whatever the claim was. Being bogus obviously, but it was bad enough that the police felt they had the need to break in and clear before proceeding any further, which means they were probably told he was a threat.
I always felt like people put too much stock into being handcuffed or not, yet it sucks. I've been handcuffed before, In a similar but not nearly as severe circumstance.
It's not meant as a punishment. It is just protecting the officers who arrive on scene because yes, people do cooperate and then they pull out of knife or gun and try to kill the first responders.
This is always felt really weird to me in general because on one hand you do have a lot of over aggressive police officers in the States but on the other hand you also have a lot of police officers who are like been through the drill and are just calm as fuck about it.
I feel like the immediate pucker factor would be nine times higher if you're in the States, but then it either goes to shit real fast or settles down real fast.