You lose your phone for a few days it's inconvenient but not a big deal.
You can't use a tractor for days to potentially weeks at a time and you can end up losing an entire crop field, that's the type of stuff that can literally lead to bankruptcy.

You don't own a JD tractor but "the vehicle owner receives an implied license for the life of the vehicle to operate the vehicle, subject to any warranty limitations, disclaimers or other contractual limitations in the sales contract or documentation"

https://copyright.gov/1201/2015/comments-032715/class%2021/John_Deere_Class21_1201_2014.pdf