Robot milkers are much more comfortable for cows, but the result of advancing farm automation (not limited to dairy farms) will be to eliminate most of the jobs that remain there.

There will indeed be a need for people to repair robots, but I'd expect to see only one repair job for dozens of today's milker jobs. And jobs reprogramming robots will be fewer still.

Add this to the automation of other kinds of work, and it leads to economic disaster.

Eventually most of the automated farms will cease to be needed, because the people who still have an income won't need a lot of farm products.