Alternative take, but I get a lot of value from gardening as complimentary to supermarkets.
I normally grow potatoes, carots etc, and have an apple tree, and several herbs like dill, mint, thyme etc that pretty much manage themselves. It's very far from meaning I never need to shop again, and like you pointed out, to get to that point you'd pretty much need to quit your job and work full time growing food.
That said, it does add a bit of resillience into the system (as well as being rewarding) in the same way having solar panels might shield you from energy cost fluctuations without totally removing your dependence on the grid. I save a lot of money on fresh herbs, and never need to buy apples during season.
I normally grow potatoes, carots etc, and have an apple tree, and several herbs like dill, mint, thyme etc that pretty much manage themselves. It's very far from meaning I never need to shop again, and like you pointed out, to get to that point you'd pretty much need to quit your job and work full time growing food.
That said, it does add a bit of resillience into the system (as well as being rewarding) in the same way having solar panels might shield you from energy cost fluctuations without totally removing your dependence on the grid. I save a lot of money on fresh herbs, and never need to buy apples during season.