Question about bad winter storm warnings?

How come when a bad winter storm is going to happen, authorities warn people stay off the roads unless absolutely necessary , but you never hear them telling companies, and businesses to keep their employees home during the storm why not?
You always have some supervisor, or boss that lives for job and will get there no matter how bad the weather is and expect all the employees to do the same, wouldn’t it be safer for the authorities to tell companies keep your people home during this weather event?