[NEPatriot]

The issue as I see it is that not everyone has great vision when it comes to building products/services one could turn a business into. In fact most don't which is why the 10-will-you-buy test is a good way of hacking around this lack of vision.

[alexrodygin]

The funny thing is that the blog's author himself succeeded without talking to customers. Imagine if he talked, found out nobody wants it and quit without pivoting.