For the same reason why Farmers are doing business with Monsanto, profit!
Nothing wrong with that!
Higher yields, less waste etc.
My quibble is not with GE or GMO per se, my quibble is that farmers who have different business models, say wholly organic, are under the shadow of Monsanto’s products.
If Monsanto can effectively quarantine their stuff, no complaints from me, however I doubt they can as nature just does not work like that, things are messy out in the field(s) and the process was never really designed to include/exclude wholly created organisms.
If Monsanto can effectively quarantine their stuff,
That's been true down through the ages, it's how crossbred crops came to be in the first place.
It's darn near impossible to quarantine anything related to growing crops, whether its 2-4-D type herbicides which have been around since at least WWII, and can, under certain conditions, drift over a mile, down a ditch and do serious damage to someone elses soybean crop, or the more modern herbicides and insecticides which have similar problems.
Should the modern farmer be held captive by his neighbors desire not to use chemicals?