It's not about being a nanny state infringing on your liberties, it's about being a responsible state, reducing unnecessary cost and wasted time from needing to peel you from the street from an otherwise survivable collision. It's about not having our doctors spend all their time caring for patients who would otherwise be fine and out of care because they weren't wearing a seatbelt. It's about not having our law enforcement and first responders there for hours and pushing others in need to the backburner. It's also more economical, as those who don't wear seatbelts cost hospitals more than those who do.
I mean, don't wear your seatbelt, do wear your seatbelt, that's on you, but at least understand that the laws aren't there to keep you from living your life how you want it, it's to prevent you from preventing someone else from living theirs.