I thought they seemed negative, until I remembered that the poster said they couldn't do consulting. It takes the discussion from "I am a skilled programmer looking for work" to "what kind of product should I create and market that will sell immediately," which just isn't a realistic discussion to have. As Bob Frances said in that thread (paraphrasing), if it were that easy, a great deal more people would be doing it.
I think people get this idea that striking it rich with a popular app is easy after reading a bunch of rags-to-riches app developer stories.
He didn't actually say "immediately". I understood that he needs $2000/month "as soon as realistically possible," and asks in which kind of software is such a goal easiest to achieve. It's just his question is hard to answer when he seems to not have an idea yet what to build...
Chances are if he really needs an extra 2k / month for health reasons then finding a job with better heath insurance is a much better option than possibly building a product that generates 2k/month in profit.
I think people get this idea that striking it rich with a popular app is easy after reading a bunch of rags-to-riches app developer stories.