The huge assumption that Nathan makes here is that "problems I have" can always be extended to "problems that a profitable target market has."

You can spend 24 hours a day researching a given topic, sure, but it's still going to take a lot of research to catch up to someone who's been living engrossed in that topic for years and years. I'm reminded of the great comment thread for Storage for Photographers, where the most valuable insights were given by actual photographers saying "Hey, this is what we would absolutely pay money for."(https://news.ycombinator.com/item?id=6020969)