I agree that the luck angle needs to be tempered by considering that there are many ways to accidentally destroy a good thing. It should also be recognized that luck is required to prevent other, bigger companies from catching on to you before you're big enough to stand up for yourself.

I don't want to discount merit or work, but we too often seriously discount luck. Luck plays a large part in every success. That's not to say that people are justified in being unsuccessful; it's just to recognize that we're all involved in something larger than ourselves.

As failure doesn't always correlate to incompetence, success doesn't always correlate to competence.