Wrong.
Legislators pass illegal laws all the time, and police are REQUIRED to ignore illegal laws.
Legislators can pass any legislation they want, and they are not criminals.
It is only when police try to ENFORCE illegal legislation that a crime is committed.
The police not only can "pick and choose", but are required to by their oath of loyalty to the Constitution.
This country would be vastly better if the police never enforced illegal legislation, like Prohibition, the War on Drugs, asset forfeiture, mandatory sentences, etc.
It is the legislators who passed these illegal laws who need to be arrested.