Following this advice will work if you're hiring contractors to do a specific project. But when you're building a company, you're looking for generally smart, enthusiastic people that will be able to do the jobs that need to be done now, and also the jobs that will need to be done when the current projects are done, or when they decide to move to a different team.

A super-hacker-who-can-do-the-job might be useful to hire for a specific project, but will they be a useful employee when the company decides to change directions or technologies?