Automating heavy machinery is a tricky business. The amortized capex can outstrip the costs of the operator by a significant margin. The cost of downtime due to AI failure may be larger than the savings of not having an operator.
If you can replace individual pickers on the other hand...
My grandfather was a farmer in Ohio. He was always very worried that I, as a small child, would get in the field and be hit and killed by his tractor. This may have been because he did accidentally kill a dog once this way.
Sadly this research is only starting to take off (with 1/1000000 of the investment too). 50B-100B industry...