I would suspect that the online communities skew a certain way that may not be reflective of the people actually doing it. One of the most well-known FIRE bloggers is known for saying that he is as active after retiring as he was before, but that he now gets to choose his projects - and despite his blog bringing in an income comparable to his pre-retirement income, blogging was not one of the major 'pulls' in his life after a while. I imagine people who spend a lot of time contributing to such forums may temperamentally enjoy the fantasy better than the reality.