Where do you live that you think police exercise no discretion at all?
Prosecutors also have discretion in who to prosecute.
Courts also make decisions on guilt.
The police generally have immunity from prosecution (forms extremely dangerous outcomes) and are not obligated by law to do their jobs.
We have had many cases where a thief have been caught by the store owner and the store owner is the one going to jail for entrapment.
Where do you live that you think police exercise no discretion at all?
Prosecutors also have discretion in who to prosecute.
Courts also make decisions on guilt.
The police generally have immunity from prosecution (forms extremely dangerous outcomes) and are not obligated by law to do their jobs.