Promoting and exploiting false distinctions can be very, very profitable for politicians, interest groups, and business quislings who’d rather partner up with agents of coercion than engage in the dog-eat-dog, rough-&-tumble free market. Such false distinctions exist everywhere (roadways, police, fire, water, courts, military, etc.), the human appetite for them is insatiable, and they are thus exploited by "the authorities" to great profit and advantage.

Here’s another example of one.