An artificial food source (Bait)is something placed by someone for the benefit of attracting something else.
Corn, soy, apple orchards..whatever, were not put there to attract anything. they are a lively hood for someone. If you grow something to not harvest it and only attract game then yes, I'll buy it as artificial. A Food Plot for example.
That's my take on it. I'm sure the farmer isn't planting his corn so I could have success hunting. In fact I've never got a phone call telling me he finished planting the corn for me the deer should be coming once it's up. And I've never called him to thank him for baiting for me. It's intended purpose is NOT to attract deer. Does it? Sure. A pile of corn in a specific place has one intention. To attract deer to that specific spot. I view a farmers corn field as taking advantage of what the land gives me. Same as acorns, water sources, apples, etc... If he decided not to plant the following year and it grew up into overgrown crud, I'm still hunting that land. I'll change my gameplan and figure out where the critters are.