A lot of this is covered via my copy pasta I just sent of a recent post I made on the topic. If you know what you are doing, you could maybe. The food doesn't just happen magically nor can you rely on getting a good yield. Shit weather, bugs, being too sick to tend crops, the fact that The Local Market for you in this day and age is a weekend farmers market where you're probably competing with actual industrial farms but with crunchy advertising and selling to a small crowd of hippies and other people who wake up and go out early on a Saturday, there also just isn't a market in the economic sense for sustainability. Even industrial farms rely massively on government subsidies. It simply isn't reliable. In the past it was more doable because the economy was agrarian and that's how everyone was operating. The other factor is the OG farmers could pass down folk knowledge and it could work okay without real science because they weren't going through globally unprecedented without a meteor hitting levels of climate change. To know how to grow shit good in our current conditions is like brain surgeon levels of science.