""" Bob explained that weak opinions are problematic because people aren’t inspired to develop the best arguments possible for them, or to put forth the energy required to test them. Bob explained that it was just as important, however, to not be too attached to what you believe because, otherwise, it undermines your ability to “see” and “hear” evidence that clashes with your opinions. """
I think these strong opinions change when there is information to do so, and that's probably where the whole "stay focused and keep shipping" idea comes from: collect soft feedback, hard metrics, and otherwise information by providing a product-as-a-hypothesis. The more often you ship and measure, the better your direction and your alignment with what people will pay for.
just like, say, a theist or an atheist, in-between which fits the agnostic (the epistemically helpless person in this case).
Put other way, if you are susceptible to argument, you must be willing to accept the risks, or unaware that there are risks in committing fully to an argument and a premise. This seems particularly suitable to startups where oftentimes evidence of demand, market size, or growth is conspicuously absent at the moment of inception.