I have worn a seat belt since the first time I sat behind the wheel of a car, which was in 1970 - way before the law compelled me so to do.
It seemed like a no-brainer to me, and always has done.
My dad, who taught me to drive, always used to huff and puff at me when I asked him to wear his belt, but he did wear it, and eventually got him into the habit, which saved his life in a crash a few years later.
I think people have some bizarre idea of 'freedom to choose' when it comes to seat belts, combined with the fact that some people find them uncomfortable.
I don't express freedom on the way of not wearing a seatbelt, and compared with the discomfort of a quick trip through a windscreen, I'll take the belt any time.