Disagree. There are plenty of people who would do the work, they're just not willing to do it for the amount farmers are willing to pay.
Also, you'd have to be insane to do outside work in both Florida and Texas, now that both states have got rid of mandated water breaks for outdoor workers.
You can, but then you never know what the junk is hiding: patches of bare dirt, certainly, but also oil, transmission fluid or other toxic seeping into the ground, small bits of metal parts (you know they're not going to find everything) that become missiles when bit with a lawnmower, etc.