Poor analogy. You don't inject a seatbelt into your body that cannot be taken out. Seatbelts have been tested for years and on crash test dummies. We also know the risks of wearing or not wearing a seatbelt. You also know the possibilities.
If you are young fit and healthy why put yourself at risk from an experimental medical intervention?
With statistics, %30 of all fatal car accidents in Australia drink driving was the number 1 contributing factor. So does that mean that everyone should be driving around drunk, as %70 of crashes don't have that as a contributing factor?
Mark Twain "There are three types of lies. Lies, damned lies and ststistics."
