That's a product of coming up through a school system that emphasizes writing engaging content to please teachers. "Oh no, the farmers can't find help" sounds alarming and draws you in. But as you point out, it ends there. Beyond that, the academic goes off and does whatever is interesting to him personally without concern for what anyone else might actually need. And fair enough. He'd be working in industry if he were trying to please others.
And a farmer myself, I can tell you there is no "labor shortage". Quite the opposite. I can't find enough farm work to do! I could easily grow my operation tenfold without breaking a sweat. But there are so many other farmers who want that work as well. It is hard to compete.
I mean, many of us in academia (I was previously) have made things for industry only to learn that we ignored something important and obvious that was already known. I wish I could find the nice article that gave a bunch of examples of papers and concluded "John Deere already sells this product and it's being used at scale today; if you want to do better, at least be aware of what's going on in the field"
> And a farmer myself, I can tell you there is no "labor shortage".
Are you a Japanese farmer? The context of the paper was Japanese, and there is absolutely a labour shortage. Your section of the world is a timy percentage, and whilst I'm glad you don't have a shortage, your experience is not the worlds.