I was the OP from the other thread. callmeed understands what my intent was with the other post. Sadly, I either wrote up the post poorly, or the method of asking outright on forums is a bad idea.

Coming from a business background, I just assumed that any idea people would put out there would have been small solutions to small problems... not "sitcom startups", products with no market, or funny stabs at combining nouns with an airbnbnb business model. Perhaps I was wrong. Really the only thing I was looking for were problems that could potentially be solved with minimal capital, and only 1 or 2 people.

Maybe looking for small problems, solutions, and actionable ideas can't be done on internet forums... It didn't seem too unthinkable for me to imagine someone like Patrick responding to my initial post with something like this:

"You know what? Some teachers have approached me to build a Bingo Card Creator, and are willing to pay for it. I may be able to introduce you to them. Personally, I have zero interest in pursuing this, but maybe you do. Obviously, you will want to do your own market research, but you likely have at least a few sales. The market is niche, and I am pursuing something a little bigger that interests me more, but it could be worth a look for you. A sweet bonus is that this can probably be executed by a single person."

Interestingly, Paul himself seems to have started a company that might be earning him money and could have originated in that thread.

I was looking for ideas like Posters for verticals. Maybe Paul didn't want to start doing posters for microbreweries, but knew that people wanted them. Is any sharing of small business ideas completely useless?

Yes he went on to validate the idea, knowing that spending half a year building an app or product and trying to market it prior to validation isn't very intelligent, but I thought that was implied.