Patented organisms let their owners extract economic rent. This covers nearly all GMO and many hybrids.
Monoculture, which you'll get when the whole industry comes to rely on a particular GMO, invites disaster. The first pest organism to defeat the GMO wipes out the entire industry.
Despite the above, I'd love to see a food company brazenly advertise products that are 100% GMO. It would be funny and might even sell really well.
-There's no reason genetic variety can't be introduced on purpose, and pest resistance is part of what GMOs select for.
And go bankrupt, because you're competing against GMO crops. Just like there are damn few transport companies these days using horse-drawn carriages.
So, not an issue in theory, but in practice.
Incidentally, this isn't something that has ever been a real issue.
One farmer claimed it was, but it was pretty conclusively proven that he lied.
Among other things, industrial produce is noticeably lower quality than farmers market produce, cf tomatoes. The whole ecosystem benefits enormously from variety in produce.
How do you interpret peoples’ fear of the food?
The fear of eating it is all baseless fearmongering by the likes of homeopaths and crystal healers.