School bullies become cops in the United States?

Check this video showcasing extremely egregious behavior by two police officers. Brief summary:

Two police officers in the United States stop a car for dubious reasons (claiming that the car was "swerving" erratically, even though that's quite clearly not the case). After they have identified the driver it turns out that he has some bullshit warrant for his arrest for some extremely minor incident five months earlier where a cop alleged he had slightly damaged a sign with his vehicle (even though the damage in the sign was too low to have possibly come from his car), so they go and arrest him. Funny thing is that he man had no idea about the warrant because he was never served it, and had absolutely no idea what it was about.

Anyway, that in itself is not the egregious part. The egregious part happens after that, because one of the cops doesn't like the attitude of the man's wife who gets out of the car to film the event. The footage from the police car camera shows the two officers discussing what to do with the woman, and one of them says that they could just confiscate her phone as "evidence", and they laugh about it, and the other cop says "watch this" as he goes to the car, demands the phone and almost immediately arrests the woman, who has done absolutely nothing wrong, for no reason whatsoever. The cop even clearly expresses that he's doing this because she ran her mouth. It's extremely clear that this second arrest is completely illegal, and his snatching of her phone was completely illegal (both clear violations of her Fourth and also First Amendment rights). On top of that, after arresting her, the cop starts berating her and telling her things like "are you telling me how to do my job?" etc. etc.

This was just outright bullying, for the mere reason that he could, and he didn't like the woman's attitude.

I have for a long time now had a theory about American police: A good portion, perhaps even the majority of former school bullies become police officers in the United States, and this is the reason why abuse of authority is so prevalent there.

It only makes sense. What do school bullies do after school ends and they grow up? School bullies tend to not be the most educated nor the most talented nor brightest of the bunch. What possible jobs could they get?

Some may seek for some mundane tedious low-paying jobs in some factory. Almost none of these jobs allows them to keep ordering and bullying people around. (After all, managerial positions in companies usually require some degree of education, knowledge and talent, which most school bullies lack.)

So, what is the one (and perhaps only) job in the United States where: a) they can keep doing their bullying behavior and abuse people, and b) the requirements are so low that even they qualify for it?

And the answer is, of course: Police officer.

Indeed, becoming a police officer in the United States has almost no requirements and prerequisites at all (with the possible only exception of no prior criminal record, something that juveniles, even school bullies, don't get), and the amount of training is usually counted in single-digit months. There are, in fact, some places in the United States where police training is just 2 and a half months, and that's it.

This is extremely different from most other countries. For example in Finland police academy is 4 years, and it's in fact an actual "college-level" academic degree that has passing requirements, just like any college-level degree (well, the equivalent of "college" in Finland). Among many other subjects, Finnish police go through several years of law education and have to pass relevant law exams.

In most of United States there are no such requirements. In fact, "police academy" is not any sort of higher-level academic degree at all, like it is in Finland and many other countries. It's just, essentially, some months of training and that's about it.

Which is why school bullies can easily pass such training and become fully certified police officers, and thus they can officially continue bullying people as they want, wading that line between what's legal and illegal abuse of power (something that's greatly helped by the general attitude of the American police that they will always defend their own and not "rat" on each other nor turn against each other.)