I don’t think the article is saying working hard is a weakness. It’s saying don’t use work to hide from real life. For one thing working long hours and working hard aren’t the same thing. Actually the people I know who have spent the most hours at work tend to get the least done. And no matter how long you spend at work whatever your real world problems are will still be waiting for you, and they might be getting worse depending on how the spouse and kids feel about you pulling 100 hour weeks.
Workaholism isn’t productive. That’s just being at the office a lot. Getting a lot accomplished is productive. And that MIGHT involve extra hours. But it doesn’t have to.
I worked with a guy who was always in the office. Everyone knew who has was, no one knew what he did but he was always there. When Diversity became a thing, he became an American Indian. Decorated his office for it and put a picture of some random Indian at a PowWow and claimed it was his grandfather. He seemed to spend a lot of time trying to find someone to do some work for him. Our boss forbid us to help him.