But, we have to remember, the average consumer is not as well technically minded as most of you reading this so they don't really know the difference is SSD and HDD are, much less care. They just care about something that works for them. How it does it, they don't really care.
Also, it seems that Apple has a conflict of interests: on the one hand, it wants high market share. On the other hand, they want to make the really fancy, high class devices. Unfortunately, they're all fairly expensive. Plus, isn't something like 60% of the world's wealth is in 1% of the people? So a lot of people can't afford to buy Apple products.