I find it highly interesting that Agile methodologies would tell you that the secret to a project's success is continuously having the customer tell you what he

I find it highly interesting that Agile methodologies would tell you that the secret to a project's success is continuously having the customer tell you what he wants, while Eric always repeats that the customer is very unlikely to know what he wants. I wonder if the former works fine for "been done before" projects and Eric's approach is almost exclusively for highly innovative products.