I've heard this type of thing before but it seems to set up something of a false dichotomy to me. Not having to work a full time job doesn't mean doing nothing, it means financial independence to pursue whatever projects are meaningful to you. I don't really resonate with the approach described in the article because for me those projects tend to require a bit more than a subsistence level of income. There are endless interesting projects to pursue that aren't the most viable options when you have to worry about paying the bills however.