Nonsense. The police often won't even come out unless someone is injured or there is significant damage.
With modern cars, rubbing your dong on it can cause "significant damage"
Paint? That'll be $500. Broken tail light? $30,000. Optional gold colored Toyota logo, $100 (it really does cost that). If any metal is bent, you're automatically looking at the $1000 range.
I think my local laws say $1000 damage
or if someone is injured, it must be reported. You don't need a report if you are going through your own insurance. If the other guy's insurance is paying for it, they'll ask for some police report or some evidence that their client is responsible for the damage on your car. With no report, the client can say "it wasn't me" and you're up sh!t creek because you have no proof that he hit you.