Look I’m as much “fuck cars” as the next guy but riding a motorcycle on a highway is unironically suicidal. I personally know a guy who got in a bad crash on one but miraculously survived; he had a year long recovery period but will have various pain and dysfunction in his body for the rest of his life. I also know some people who did pathology rotations (state medical examiner office, autopsy basically) and the big three categories of bodies coming in were drug overdoses, suicides, and motorcycle crashes.
One of the facebook comments links to a seventh person who died a few days before these on June 18th: https://www.fox13seattle.com/news/motorcyclist-killed-sr-530-crash.amp
I suppose bikers will go for routine checkups and respond to the doctor, “Jeez, I’ve been riding for ten years and nobody ever told me it was dangerous!”
The lessons are the same from every public health concern: risky sex, obesity epidemic, smoking. Badgering people is really fucking annoying for everybody involved - so annoying that they’ll have worse healthcare outcomes in general - and basically nobody will make lifestyle changes because of it. The most you can do with non-structural solutions is get people to take prophylactics or wear a helmet.