What a ridiculous question. The article itself explains it: software is swallowing the world. 7 of the top 10 companies by market cap are software companies (or closely related). Do bankers tend to lead banking companies? A cursory glance at the top-5 banks in the US indicates that to be the case. They were largely founded by, and are currently run by, bankers.
The reason I was given for this advice is that they don't understand how iterations work in software, and so they can grossly misunderstand your level of doneness. This is first a big headache and then a source of post-release problems because you end up rushing things out.
Getting more software-savvy people into management in more industries would definitely help with that.