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.
Only 11'000 years ago we domesticated first plants. Domestication means we switched from hunter-gatherers into someone who lives along a field of specific grass, weeds it, cultivates, nourishes waters.
Some grains are larger, some are smaller as result of random mutations. You eat the smaller, and you leave the larger to grow, because someone noticed larger seeds result in more larger seeds.
Bingo, you've artificially selected a modified DNA for future breeding!