Were I think the big difference is in this thread is location, situation, and what people use for calculating profit. Some areas simple can't operate the same as others.
Now if your lucky enough to be in the farm belt that is were figures can really start changing. my corn and alfalfa production pays for all upkeep on place. Pays the land payment, irrigation expense, taxes, fuel, and all upkeep. Also puts up enough hay to winter the cows over what is sold.
All this to me is what would be just waste and I use it to winter. So very little input cost for me. Like I previously said crops pay everything for the cattle and property cattle are there to not waste ground to wet to farm and not waste hay that can't be sold. I also pasture the corn stocks off for winter feed.