Because if everyone involved is quitting their jobs, they'll have no money with which to buy food. Which means they'll have to farm it themselves. And farming, even with top-of-the-line modern tech, is backbreaking fucking work. Also unpredictable as hell: bad harvests aren't uncommon, especially for novice farmers with no formal training like these guys would be.
In other words, one bad harvest, and everyone in the system you're proposing fucking dies. Yeah, there's a reason in the 1800s people were abandoning their family farms for the horrorshow of Victorian era-factories en masse: because even that hell was still preferable to farming.