Comment by romwell

>I grew up as a proud resident of New Hampshire which has no such law on the books despite being one of the safest states to drive in the USA.

Last time I checked, you couldn't legally sell a car in New Hampshire which did not have seatbelts.

You're comparing apples to cardboard boxes here.

>Motorcycles are legal so why shouldn’t driving alone without a seatbelt?

Irrelevant. The question you need to ask for a fair comparison is:

>Motorcycles are legal so why shouldn’t SELLING A CAR without a seatbelt?

The answer is: because these are different vehicles with different use cases (and adoption levels) that require different kinds of licenses to operate and have different kind of negative externalities.

Same reason motorcycles aren't required to have airbags.