I agree so much I started a side project, https://automicrofarm.com/
Rob Greenfield's project only works because nobody else wants to forage the city and he says he farms yards of some people who don't do it themselves.
https://news.berkeley.edu/2015/05/07/soil-depletion-human-se...
The US needs more farmers and people living choosing a sustainable simple life, not smart tractors.
Depending on your climate, you might enjoy mushroom cultivation. It's very low-effort and climate resistant to grow shiitakes or winecaps if you have some shade in your garden
I'm currently looking at places where growing some of my own food might be possible and I'm curious what is possible.
(I'm working on a blog post to answer the space needed question.)
I don't believe any of these ideas should be an all-or-nothing venture but if individuals can take back just 10% -20% of their diet from unethical agri-business, it's a MASSIVE win for health, self-reliance, environmental awareness, and community building
Granted, I'm talking about a cultural shift and you can't force people to enjoy gardening, but there are some people who are doing incredible experiments in urban farming which is still mostly low-tech. Even though he is an extreme example, Rob Greenfield shows what is possible with a typical 1/8 acre city/suburban lot. He is currently experimenting with growing/foraging 100% of his diet in a city.
http://robgreenfield.tv/foodfreedom/
The biggest shift will be to convince people that turfgrass lawns are the one of the biggest waste of resources in the modern world, and a silly cultural relic.