The fundamental disagreement I have with the post is the idea that you're foolish for doing something because it probably won't pan out.

So what? Why be so terrified of failure? I think it's better if kids learn to be brave, and pick themselves up in life after they stumble. Living life in utter fear of failing at anything seems like a terrible way for your children to start off life. Besides for which few things are better learning experiences than trying to start your own company.

And who knows. They might even succeed beyond their wildest dreams, as some do.