Yes, I love this realization.
People don't know what they want, but they sure as hell know what they don't want. I think this ties both to businesses (specifically startups and what they focus their efforts on) as well as employees and entrepreneurs themselves.
To quote Henry Ford: "If I had asked people what they wanted, they would have said a faster horse."
For lack of a better word, I'm going to call this the over-association fallacy. The over-association fallacy is when you think "I must have X, Y is one way to get X, therefore I must have Y."
This post is a classical example of the over-association fallacy. What the author really wants is the freedom to experiment, and he concludes that you can't have this in a big company.
However, there are plenty of big companies that give you that freedom, and plenty of small companies that don't. The smallest company I ever worked for had 4 people, but the CEO was an extreme micromanager who layered huge amounts of work on his employees and was terrified of innovation. In contrast, I had a huge amount of freedom to play around at a giant bank, because I automated all my work and my manager only cared about the quality of work (not how many hours I spent.) The result of this playing around helped me learn a lot and save the company millions of dollars.
So keep in mind what you really want. Don't avoid big companies, avoid places that don't let you learn anything.