Ok, fine. But the argument above it that somehow these issues affect bikes, but not cars. Last I checked black-ice is just as much of a problem for cars.
And what about everyone else? Going sliding on a bike isn’t great, but it’s unlikely your bikes gonna put it self through the front of a shop and kill someone.
Your car on the other hand, you lose control of that, and bystanders are in real trouble. Not to mention there’s plenty of incidents everyday of people loosing control of their car because they’re not driving to the condition (presumably because the big metal box makes them feel much safer than they should) and killing themselves and others.
Much less likely that a bike rider is going to ignore the prevailing conditions and injure themselves or others, and if they do, the impact is substantially lower. Adding more mass and speed to an out of control situation never improves the outcomes.