And, as a for profit business, they don't even have to hit anywhere near 100%. They just have to do well enough in how they operate not to loose business or somehow jeopardize what they have. It's really that simple.
This is a story that prior to the Internet nobody would ever hear about. No journalist would tell this story except in a magazine piece maybe that had an agenda and wanted to paint a picture.
This tale goes nowhere near even scratching the surface of how business operates. Spying. Payoffs. "Cut off their air supply" (Microsoft/Netscape)
Here's a story from when I started in business years ago. I called a friend of my fathers for a reference on someone who had worked with him in the past. He said "hmm, Bob left his job? Hmm." and then gave me a nice reference on him. Before I knew it he had hired Bob and basically told him "he's a startup you are wasting your time". I lost out on hiring Bob. This was a friend of the family. That may or may not be how any one of us would operate but in business as you say you can't be "a precious snow flake".