Why developers make games that are "too" hard?

This isn't my writing, but I felt the need to share it. It is from the Wall Street Journal, a medium that I am actually surprised would run this.

http://online.wsj.com/article/SB122238237801276797.html

Again, I'm surprised that the WSJ would actually put this up. However, it just may be a sign just how mainstream the industry is becoming. As to if that is to the industry's advantage or detriment, we shall see.