I think the main point of this article is that to be a good entrepreneur we have to solve real world's problem with our product so people will use it. Our type

I think the main point of this article is that to be a good entrepreneur we have to solve real world's problem with our product so people will use it. Our type of business doesn't really matter here. We can build a successful web startup if our web actually solving real world's problem. E.g. people use google and wikipedia because it solve their problem.