Good points...but these are also blown out of proportion by social media.

For many decades, hybrid seeds have been used, and it's pretty well known that second generation plants from those seeds don't produce true replicas of the original generation. As a result, farmers regularly buy first generation seeds from providers, rather than attempting to reuse whatever falls in the field. Saving seeds generally doesn't make economic sense anyway, and it's pretty regular practice to just buy seeds that carry quality guarantees and plant those.

The farmer in question that you read about is Percy Schmeiser, and the case involving him has been overhyped. Hey, it's the internet, ya know? Read about Percy and his case here:

https://rationalwiki.org/wiki/Percy_Schmeiser

There have also been claims that Monsanto has pursued legal action from farmers for accidental cross pollination...but there has been no actual record of such activity. Again, baseless accusations propagated by social media.