I think it's wild that people spend their own money to surveil themselves every second they're near their car. Maybe I've seen too much lawyering on TV and in movies, but if I'm in a collision with you, I'm definitely asking the cops to pull the SD card from your dashcam.

Whenever I point out I think this self-surveillance is crazy, the response ends up sounding something like "oh, no big, if I think I did something wrong I'll just hide the evidence and lie to the police and say it doesn't work", which sure doesn't sit right with me.

Why do you think potentially self-incriminating self-surveillance is "crazy" when you also think lying to the cops and other involved parties about what happened is bad? If you believe it's important to tell the truth in these situations, you should have no problem providing your own recordings of a collision, regardless of who is at fault.

Or is your point just about the cost of the dashcam being "crazy"? In that case, hypothetically, what if your insurance company cut you a check to buy a dashcam of your own choice and install it on your car?