Perhaps you've never tried to teach Night to relatively new divers. It is a LOT more that light handling! For example, buoyancy control is much harder when you have fewer visual clues as to your position in the water.
Your denigration of Boat has some truth -- for the old Boat diver course. The new one has a lot more material in it, and is especially valuable to people with no experience on boats. Not everyone will learn a lot in the Boat specialty, especially of they have been around boats a lot, but there are a lot of land-locked divers who've never been on a boat, and they have a lot to learn and experience. Also, watching some "experienced" boat divers take up a lot of space with their gear lying all over the deck and benches makes me think they could benefit from a good class -- or whack on the head -- too.