Earlier quoted context omitted.
And you can be the best car driver and still sway off or have some idiot crash into you head-on or miss a red light...
At a minimum you're belted in surrounded by a cage. More likely you're belted in your cage and surrounded by airbags. Apples to orangutans.
THIS is the major difference, protecting even the best motorcyclist's abilities.
Some US highways are posted at 85mph [137km/h] – unprotected flesh doesn't stand a chance!