Does he answer the question “why qualia, of any kind, ever?”

> Dennett most certainly tackles the "hard problem", by convincingly arguing the problem is ill-defined and not a real problem.

No, like everyone else he admits defeat before it and tries to define it away. Whatever the relationship between qualia and physical reality, we experience them (I do. Dennett might not, haha) which requires some explanation. Once you have that everything else is easy, but there’s no reason for there to be an experience at all.