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'm genuinely in favor of making all cars throttle limited to 65 mph and as light as possible. Fuel savings, less dangerous in a crash both thanks to speed and mass reduction, and maybe people won't drive around like complete assholes disregarding the life of everyone around them if they can't feel an inhumane power of speed and heft.
But until then, riding on a motorcycle in this society is basically Russian roulette.
Cars are so closely related to the idea of freedom in Amerikkka that doing this would trigger some sort of revolution.
California drivers were already whipped into a frothing rage when their freedom to endanger the lives of everyone around them was threatened, so they watered it down to having the speedometer beep at them