Famous pivot stories are often failures but you don't need to fail before you pivot. All a pivot is is a change is strategy without a change in vision. Whenever entrepreneurs see a new way to achieve their vision - a way to be more successful - they have to remain nimble enough to take it.
I'm not on the run from anything and I'm not at all clear about what I'm running towards. But as some great writer put it I want to be certain that when I arrive at death I'm totally exhausted.