I see your point and have to agree with you.
Here in Nebraska I have always thought that it was kind of wierd that we have both a seatbelt law and a helmet law, but yet you can't get pulled over if you aren't wearing your seatbelt. The officer has to have some other reason for stopping you other than just just seeing that you aren't wearing you seatblet. It's basically called a secondary offence. But, if they see you on a motorcycle without a helmet they will stop you on the spot and give you a ticket, which I believe is called a primare offence.
It seems like most state have seperate standards when it comes to seatbelts and helmets. And it's even more odd how some states put the priority on one while another state will have thier priority on the other.