Plans are inconsistent with improvisation. And you have to be able to improvise. You have to be able to pick up opportunities that come along.
The timing of long-range plans is screwed up too. You have the most information when you’re doing something, not before you’ve done it. Yet when do you write a plan? Usually it’s before you’ve even begun. That’s the worst time to make a big decision.
Make decisions right before you do something, not far in advance.
Working without a plan may seem scary. But blindly following a plan that has no relationship with reality is even scarier.