Your ideas and precoonceived notions block your ability to see reality.

I was once angry with my business partner, who signed up a hotel as a customer for our internet cafe business. I thought it was a distraction; it didn't fit our marketing plan. That hotel made more money than the rest of our cafes. Now, it's a million-dollar business selling to hotels.

The corporate world is full of ways for you to convince yourself that your idea is good. Business plans, business model canvases, personas, selling "benefits", focusing on "beach head markets" - all these tools are useful when they drive a sober look at reality.

When you use them to write fiction, they become detrimental filters, preventing you from seeing the real need and opportunities.