The cameras are there to generate income. It is not about laws now.
If your vehicle is beat up with a bat and all the lights and windows are broken out. Even if there is blood at the scene. They won't do more than write info down... no finger prints, no ivestigation. Most police forces are just in the job of making money.
It is not the officers fault.... just your local governments fault.
Sorry you have this opinion but it is just that, an opinion and frankly fits the definition of blivet very well.
Having been in the job I can tell you that the folks in cars really don't care much about writing a ticket, most consider it an inconvenience that they have to do. They'd rather be on a call and with the staffing low and the call load high that's where they spend a lot of time.
As far as the vandalism is concerned. What did you expect to happen? That they would send out "CSI" from hollywood to take pictures of your damage? Do you expect to have finger prints taken on the broken glass? What exactly are they supposed to do for you? If there are no witnesses, no pictures (ie. surveillance footage) with a recognizable face and or license number of the suspect vehicle, if any, what are they going to do for you? There can't be any prosecution without those things. You can photograph the damage just fine by yourself and give it to your insurance company. You certainly don't need to Police to do that for you. In short, if there is no chance of a prosecution there is no real reason for them to be there. You can get a report number by phone if you need it for insurance purposes.
Oh and doing a DNA test is not a cheap or convenient thing like they show on TV. It's only good if you have something to compare it to as there is no national data base of the DNA of everyone that is in the the USA. Sorry but "CSI" just doesn't do stuff right away since it's only fiction, like getting finger prints off of rocks. Real crime tech and evidence analysis is a long tedious affair that costs quite a bit of money. There is only so much available to spend in the budget.
You should also know that a simple fender bender, thanks to the state legislatures actions not the Police, is no longer a criminal situation. It's a "civil" situation and that makes it outside of the jurisdictional requirement for Police to respond without significant injuries or death which would make it criminal. Lot's of places no longer have Police respond to them and just tell you to exchange info. Thank the state legislature for that one.
If you think the job is just about making money, try it sometime.