I'm a big believer in letting different conveyances enjoy their superpowers. Cars can transport you at 80mph with a cage and climate control, motorcycles can lane split and filter, and bicycles have better environmental awareness (importantly because they are slow and can hear) and are less likely to cause serious injury or property damage so they can ride where cars and motorcycles cannot.

They're not the same and we don't have to give them exactly the same rules. In fact, we never have.