"As soon as it's written, every business plan is wrong. Good
entrepreneurs recognize this, and tend to build agile teams that can
quickly respond to early market information in order to identify a real
business model and minimize risk."

Josh Koppleman

In a great Yogi Berra wisdom for startups article.  There are really two main points to the article.  One, entrepreneurs need to "pivot" or change their initial strategy and vision.  Two, you need to know what inning the game you are playing is in so that you can act accordingly.

And don't forget, venture capitalists do not read business plans.