People buy 8 airbag cars from japan but buy that stupid "Type R" or "Playboy Bunny" belt buckle to quieten the "reminding beep" to fasten their seat belt because seat belts are for "burger" people.
No belt buckle - no airbag would work. - Your point is invalid.
In the odd cases airbags and belt tensioners do deploy in a car - the repairs people dont bother replacing them either, just cut the fabric, fool the unit and sell the car to a new owner, rinse and repeat.
most complaints are - Airbag bohot mehenga hai bhai - paagal howay ho naya lagwaaon..