There is a deep misunderstanding about how modern farms work. Farmers are smart - they have to do because there is no iterating on a bad crop. You fail once or twice (often because of reasons beyond your control like the weather) and you can be out of business. And failing might not be known until a 6-9 month long harvest.
Farmers love "Big Ag"'s seeds not because they are naive, but because they have a local sale rep who knows the soil conditions and can recommend a variety that will do well for them, and also has a lot of technology backing that up. And the farmers have a lot of their own data - both digital and well-worn knowledge from neighbors. They will gladly pay a lot for seed if they know that seed will produce N% more output.
And no one saves the crop seeds to plant next year, although they easily could despite EULAs, but they know that hybrid drift and other factors will make less money.
Like Smarter Every Day says, farmers are smart[0].