Many years ago one of my neighbours tried not rotating is crops. It worked out okay the first couple of years, but it wasn't long before his yields nosedived and within the five years he was bankrupt.
My family's been farming corn on corn for 20+ years. Started strip-tilling in the 80's High residue fields help trap as much moisture as we can with limited irrigation capacity. Farmers have no choice but to take care of their soils to remain viable. And more than viable, be profitable as there are many people who depend on them both for their livelihoods as well as an ever demanding population with mouths to feed.