Like many others, the 'spin' (false news) about the so-called safety of seat belts sounded convincing to you, and that's no surprise since so much money is involved.
When they first came out, a lot of people at many levels pointed out that it should be a matter of choice, mostly because practically speaking
wearing a seat belt often resulted in a persons death instead of surviving an accident,
and the old "projectile" excuse was not based in facts.
Since then (it has been decades ago) the statistics have been overwhelmingly stacked so people cannot know or find out the truth about it, (or air bags either). (or loss of steel bumpers !!!! either , and how many lives that cost, and how many billions of dollars also )