IF ALL police officers are using the line that they must not be jailed -because they are police officers -in my mind that's a moot point -don't attack innocent people.
Another nasty US attitude import - where Police Unions one of few allowed to be powerful - routinely use this excuse to protect members who kill innocent people, sometimes on video. Derek Chuavin, George Floyd's murderer will use it too.
Time ago in the UK when police were caught doing wrong they had the book thrown at them for destroying the public trust. Good cops wanted that rule too because they know they only get to do their jobs safely with public support. Who could think it a good idea for Britain to start down this road of 'police are above the law they serve' mentality ....???