I don’t understand you’re explanation.
Did you know we have huge problems here in the Netherlands with pollution by factory farming? The soil is unhealthy (too much nitrates) caused by factory farming and chemical industries.
We have way too much huge chicken, cow, goat, pig and other animal farms. Feed is imported from countries like Brazil, who burn rainforests to grow gmo soy and corn.
We also have invented so-called vertical farming with greenhouses to address the food problem. Meat (growing animals like pigs and chickens ) costs a lot more nutritious feed than eating veggies with proteins. So there is hope for the future if we downscale the factory farms and give the organic farms and healthy veggie farms/greenhouses a chance to grow.
You do not have enough land to support your population.
If you eliminate your modern, efficient farms you have even less ability to support your population.