I was born in the 1950s. Back then, a lot of the picking of crops was done as summer jobs for high school students. We picked berries, beans and other produce. It was fun, it was there I first smoked weed, met. bunch of great people and made some money. The idea that no one would pick crops is just ludicrous.
More recent, one time driving through one of the fertile valleys of California, I observed laborers harvesting what looked like cauliflower. The stooped down, cut the plant, then stood, climbed 2 steps onto a trailer type thing being towed ahead of them and put the cauliflower in a bin. Then jumped down to get another one. I wondered how long I could or would perform that task. It was nothing like the farm labor I did in the 60s.