I agree, but even traffic laws are unfairly enforced to give police officers a reason to stop “suspicious looking people”.

I'd argue that the incessant beeping that all modern vehicles do when you don't wear your seat belt has more effect on enforcing seat belt usage than the threat of a ticket.

I think you greatly underestimate seatbelt laws. Seatbelts were seen as bike helmets back then, almost nobody used them. For example, according to this study setbelt laws increased seatbelt usage from 6% to 70% in just a few years.

https://www.sciencedirect.com/science/article/abs/pii/000145...