It's hard to build your consultant image by telling people that multiple methods and tools might work. It's easier to market a simple cure.

Also, the point to "stop making shitty software" is not the same as "stop making mistakes". You can ship high quality software even while being human, it's just slower and more costly.

And while I agree with the article in general, I do believe the current balance has shifted towards too fast iteration and shoddy quality. Just look at the recent iOS/OSX releases. But even that might make business sense, because of the even shittier alternatives.