This story has been playing out for a long time now. The plowshare, the printing press, textile mills, cars, etc...
The plowshare replaced a team of people doing the work by hand. What happened to those people when the plowing "robot" took their job?
I bet it was hard times for them, but you can't avoid the fact that we're all better off for it.
So, since we know what happened in history and can't see into the future, a more interesting way to pose this question with an understood context would be: if you were a field hand that lost your job to a plow, what would you do?
Or maybe something a little more recent in history?