They want to beat people up.
They want to be tough guys who have no consequences.
Talking about how to fix policing means nothing until:
* police go to jail
* officers who do not report other officers go to jail
* bosses/chiefs etc who are aware of abuses of power and brutality and do not arrest those officers go to jail
* police are tested regularly to ensure they actually know the law, and psychologically tested to ensure that they can still be safely an officer
* restrictions on officer IQ are made illegal
* police union members who are aware of misconduct and fail to report it go to jail
* all lawsuits are settled with funds from police pension funds
* dismissal or jail due to misbehavior bans the former officer from ever being part of any law enforcement, body guard, or security position.
* police officers are required to get malpractice insurance. The tax payer should not be paying for criminal behavior.
Talking about training when the entire police system is designed to ensure police have no culpability is pointless.