There's an intellectually coherent argument that Monsanto should not be able to patent the system of glyphosate-resistence at all. I'm assuming that's where you're coming from.

But I'm not engaging with that argument.

All I'm saying is: the thing that does not happen, but that everyone on the Internet seems to think happens all the time, is Monsanto seeds blowing onto some random field, and then Monsanto suing you when you sell the resulting crop.

Everyone who has been sued by Monsanto has taken active steps to capitalize on their "unauthorized" seeds.