Kahneman and other psychologists have long established that we color character traits into stories that fit the result. If a CEO is pursuing his beliefs strongly and the company succeeds, we call him a visionary. If the company fails, we say 'he never listened'.
If you really wanted to check the influence of a certain character trait, you'd need to try to (carefully) compare how CEOs with the trait performed compared to CEOs without the trait, and make damn sure your sample sizes and methods are sound before making any confident assertions. What you definitely don't want to do is look at a handful of failed companies, find some common traits among their CEOs and call it 'The 7 Habits Of Spectacularly Unsuccessful CEOs'. That's intellectually negligent, and it's a testament to something that is fundamentally broken in journalism — we have publications that pretend to educate when they in fact serve misinforming entertainment.
Shame on Forbes for publishing such ill supported claims, they should have more respect for their readers.