while they refuse to enforce laws like the minimum passing distance for cyclists even when they’re literally handed the evidence needed.
It’s not enough to show video footage of a car passing a cyclist. The cops need to know who was driving the car.
Police speed/red light/mobile phone/etc infringement notices are only issued if they have an accurate photo of the driver’s face (or, if they pull over the vehicle immediately and identify the driver). To achieve that they use powerful flashes when the photo is taken. They send the notice to the registered owner of the vehicle but they also need the photo to sort things out when the driver says “that wasn’t me”.
A bicycle GoPro is just too small, and has no flash. You’d never be able to identify the driver.