Farming subsidies etc are the reality in high-income countries like UE or USA. But UE doesn't really *need* GMO because it can produce huge amounts of cheap food already.
GMO is needed in the first place by low-income countries in Africa and Asia, which still experience famines or vitamin deficits in 21st century! And here you have Greenpeace "heroically" destroying Golden Rice or Bt brinjal crops for the sake of... "purity" and fanatics like Vandana Shiva.
> you have made many assumptions
This one I understand, and I understand your concern. There's plenty of improvement we can add to the current farming practices. There's biochar, permaculture, hydroponics etc.
But there's one thing you can't do: you cannot move people from their lives back to farming from before the Green Revolution, when whole countries were largely agrarian, and people were working 16 h per day, 200 days per year just to feed themselves.