I don't think your point and their point are mutually exclusive: - no seatbelt, you want the airbag to catch you (better than no airbag) - with a seatbelt, id

I don't think your point and their point are mutually exclusive: - no seatbelt, you want the airbag to catch you (better than no airbag) - with a seatbelt, ideally the airbag doesn't (need to?) go off, but if it is necessary you'll be glad of it