Oh mate, I'm aware of John Deere and their "but we can't let the farmers repair their own equipment because the environment"

Yes, because independent repair shops are definitely going to sabotage your tractors to make them worse for the environment if you don't step in and stop them!

It's totally not about establishing a monopoloy to force farmers to pay exorbitant repair charges, or face paying for a whole new tractor entirely when you refuse to do repairs. Not at all!

/s in case it wasn't obvious