You are framing it as black & white - I think miscategorising the article and Bezos. From the article:

  Decisions fall somewhere on the continuum from reversible to irreversible. You can tell where a decision lies on this spectrum by asking how much it would cost to undo. The higher the cost to undo, the more irreversible it is. The lower the cost, the more reversible it is.

  Bezos considers 70% certainty as the cut-off point where it is appropriate to make a decision. That means acting once we have 70% of the required information, instead of waiting longer.