Lack of options? Show me a shaving razor or printer or air filter that isn't gouging me on the price of consumables.
Fundamentally you can make more money by overcharging for consumables and undercharging for the product itself, than you can by "fairly" charging for both. In any product or industry with high entry costs (read: low risk of new competitor market entrant showing up), many businesses realistically are going to leave that kind of money on the table?