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Son
the practice is encouraging some opportunistic individuals to make a lot of money by selling people what they want to see instead of real Cuban dance.
Exactly this is my problem with what you're saying. There is no one "real Cuban dance". What Havana's dance teachers are teaching -- many of them my friends, genuine dance fanatics, who would be offended to be called opportunists (they are trying to make a living like anyone else) -- is real Cuban dance. Just as the very traditional casino you're talking about is real Cuban dance. It's not just commercialization. It is a dance they love, a dance they dance in their spare time and in many cases have devoted their whole lives to. It should not be dismissed.
If you want to claim one style should be called casino and the other Cuban salsa -- fine with me. But this kind of judgmental dismissal of a dance style because it doesn't fit with your preconceptions of what Cuban dance should be is not ok (as you put it -- it's like that expectation of "their personal diamond in the rough - a passionate people with magical things that exist nowhere else").