As usual, the dose makes the poison, and people both anti and pro, are camped on their position it seems.
Yes, but it seems there is still the credo of "much helps much" applied (together with "toughen up you pussy"). Meaning they spray way more than what is needed. And usually there are lots of regulation when you can spray, like no strong wind etc. to prevent it from going anywhere else. You think the average farmer cares? As far as I know, the regulation authorities do not care either.
This method requires a lot of plant knowledge to make it work, and is not suited to the current brute force method of farm machinery which is the main method of farming.
It would be better suited to little robots doing the work, but in the mean time, the only competitor is more human hands on the fields which some people see as a backwards step.