I would think that the farmer is the one doing the actual farming - not necessarily the landowner or the owner of the equipment. As you well know, farming is a lot of activity and labor. If one plants a field of corn, beans, or wheat, who is the farmer? When that same person harvests at the end of the season, who gets the payment for the produce? The FARMER, of course. Does it really matter whose name is on the deed?
When I was growing up, there was a local guy that rented numerous fields around the area. He planted, cultivated, and harvested crops. We all considered him to be the farmer. Even though he lived in a mobile home and didn't own any land.
Something else - when a farmer "retires," can he afford to just give away his land, equipment, and home to his children? Who pays for his place in town? Who pays for his food, transportation, and living expenses? Retiring from farming isn't like retiring from the widget factory down the road. The guy from the factory has a pension (usually) and a Social Security check coming in to take care of expenses. The farmer doesn't have all of that.
Some of what you say may be true, but isn’t reality in many cases. In dairy farming, the name on the license on a proprietorship farm is considered the farmer, even if it is the 88 year old grandpa sitting in the house while his 65 year old son and 40 year old grandson do the actual farm work.
I hire my corn , wheat and beans planted, sprayed and harvested, but it’s still my land, my financial risk. I decide what crops, how many acres, where and when to sell. On contract or luck of the draw on harvest day, or maybe pay storage and sell 6 months later. I am still the farmer, it is my main source of income and how I file my tax return.
And yes I could do the very same thing on rental land with borrowed money buying crop insurance to back my input loan, not ever own a tractor or step into a field, if it was my primary source of income, I’d still be a farmer, regardless of my age.
As far as retiring and moving into town, well that is exactly what my Great Grandfather and grandfather did, and they didn’t have to sell their farms, their boys took over the farming duties. And my grandfather had to take a few loads of hay into town each year for his fathers milk cow and driving horse, as well as several loads of cord wood, as rent, and my grandfather was also responsible for paying the property taxes. My great grandparents made enough money through their working lives to set aside some money to live during retirement.
I could have afforded to have done much the same but my kids didn’t want to work 7 days a week on the farm and have to wait until we die to inherit the farm as my father and grandfather and great grandfather did. My father broke that chain, I had to go buy my own farms, didn’t get a family farm given to me for a few loads of hay and several cords of wood.
I had enough foresight to invest some of my farm income into off farm investments, that pay me annual returns. No pension plans from work that is true, but I have several different cash streams, and not old enough to be eligible for any government old age pension as yet. Am I still a farmer if I don’t plant or harvest the crops that grow on my farm if I buy the inputs and hire the work done, dam right I am!