Motivation to make a difference is a big help. Otherwise, people might believe that they're worthless simply because they don't have a piece of paper from a college.
The list doesn't tell you anything though. It's a pat on the back for making a decision irrespective of whether it is the right one for you, and it doesn't tell you anything about how any of those people actually achieved anything.
We all love identifying with famous people that we admire, but make no mistake: these people all lived very different lives, and each had a host of reasons why apparent lack of credentials did not get in the way of their notoriety which are unique to them. Reasons which you cannot conjure just by reading a list.
Some were born at the right time or to the right parents. Some had extraordinary luck. Some spent most of their lives languishing in obscurity, poverty, misery, or Actual Work. Some were in fact quite well-educated, if not college graduates. Joseph Campbell actually had an M.A. from Columbia. George Washington had family connections and owned slaves. Eric Hoffer spent his whole life doing manual labor. These things are relevant to framing the relationship between their self-education and notoriety.
You're not worthless without a degree, but neither are you Einstein, Faulkner, Hemmingway, Tesla, or Benjamin Franklin, and you won't become more like them by hearing about their accomplishments again. Maybe most people understand that, but I've fallen into that trap enough times over the years to want to post a warning where I can.
I had started to get into this in my comment but left it out for the sake of clarity, because my point, ultimately, is as I said: there isn't much to learn from reading a list like this.