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You are definitely right on all you stated out here. But you know what kills most bitcointalk users it's the mindsets of they want to make the money so quickly without wanting to spend time study and understand the principles.
Yeah, well I think that's what many (or maybe just some) of us here knew about bitcointalk. I have to admit, I'm one of those people. But upon entering, you'll realize that it's not enough to think about earning without eagerness for learning. And you cannot earn unless you're knowledgeable about things discussed here.
Point is, we cannot really blame those who want to earn here. But they have to think of learning first because it'll feel much better if you're learning and earning at the same time. Plus, the former one is priceless.