If your startup operates on the assumption that your vision is flawless, you're not causing your vision to be less uncertain by refusing to notice the risk.
You're shooting the messenger. You've conflated trying to measure whether a strategy is flawed with causing it to be flawed. Pull your head out of the sand. It is not the fault of the book that people who have flawed ideas won't get rich without fixing their ideas.
What I meant by jury is still out, is that we might find that the framework suggested in The Lean Startup actually increases success rates amongst startups in addition to being a model for revealing truth. Revealing truth faster will allow startups to extend their runway and if we find that most successful businesses only require X pivots on average before they start to profitable, we very well might see startups be able to accomplish these X pivots succeed where they may have followed a more traditional launch and pray model and achieved fewer than X pivots, running out of runway.
If it sounds like I'm trying to be negative about the book, I'm not. It's fantastic and I'm absolutely suggesting everybody buy a copy :P
I agree with what you're saying but when the strap line of the book is "How Today's Entrepreneurs Use Continuous Innovation to Create Radically Successful Companies" [emphasis added] the misunderstanding is, well ... understandable.
- There exist at least two entrepreneurs today - At least two of them use continuous innovation - At least two of those who use continuous innovation create radically successful companies - This book will tell you how they do it