I believe luck is a much larger component than most people realize, but I don't see it as the "luck" of when you were born.

There is all sorts of business luck that occurs. As one example, in a startup you get some early customers in a vertical and the government changes the rules to make you're tech necessary for the vertical. And then no one else recognizes or competes with you on that vertical for awhile. So there is a giant don't f it up component as another comment pointed to, but you also don't get run out of business by a slightly better execution from a bunch of competitors.