I think there's always a difference in hustle required between a founder and an employee and how "big" you want to go.

You can live a beautiful life making hundreds of thousands of dollars a year as an employee and raise a wonderful family. It's a wonderful thing about being an engineer and there's nothing wrong with that.

That being said, if you are doing your own thing, and are shooting for the stars as the article mentions, you're going to need to have the hustle on your side.