This article has several ideas that are fundamentally flawed - but here's the most easily falsifiable one:

"What’s worse, a weak password, or a password that sits on your desk?"

Contrary to what is said in the article, a weak password is worse - no question. A password that sits on my desk is only available to people who break into my home. If they do that, they probably have access to other documents of some importance.

A password that is weak can allow anyone access to my account, from anywhere.