Those are low requirement jobs

Almost every body able citizen with a license can drive

Almost every body abled citizen can harvest a crop

Not EVERYONE wants to do it, so they invest time and money into themselves to get a skill level that will allow them to get a job in something else not related to the thing they don’t like

But that was in the old days or with low ROI enterprises

Now most modern agriculture is done with automation, gps tracking and smart systems

Your average crop picker doesn’t matter anymore

They’d need to be more knowledgeable to not only be in a new harvester cabin, but understand the training that comes with it