bound to be taken as conern-troll-y, but...
no matter the mad skillz (see, i'm hip, i'm uzing a "z"), and the assumed fact that the rider might have supreme control, there are a lot of variables at play here. if the driver gets spooked and brakes or swerves, any number of things can happen -- to the driver, to the rider, to any vehicle behind, to any potential cyclist or pedestrian ahead or beside.
hey, if the motorcyclist gets creamed, well, that's his or her own choice. but if there is collateral damage to innocent folks -- or if someone has to pay (either financially or psychologically) for peeling a mushy rider off the road -- then the price of the damage is all of a sudden other people's real issues.
maybe i've spent too much time on the road as a cyclist, but i really prefer it when people remain predictable and give as much attention as possible to their task at hand -- whether it be driving a car, driving a motorcycle, riding a bike, or walking down the street.
and having just sprained my wrist, two days ago, in an extremely slow-moving cycling accident, i also recognize that bad things can happen even when the participants aren't moving very fast.
ah, well, maybe i'm getting old and just don't get it anymore.