It depends on various factors.
If you live in a country like Finland you do not need the police.
But if you live in Israel, Brazil or South-Africa you will almost certainly need the help of police.
Rubbish!
So you do not need protection against thieves, murderers, muggers, rapists, etc, etc, in Finland?
Everyone is a good law abiding citizen?
Every country needs a police force. What it does not need is a corrupt police force.
The ONLY country where you would not need the police is a country that has no laws.