You are assuming that farm jobs are jobs people want. In areas where there are a lot of farm jobs available, there are usually a shortage of qualified individuals willing to do them. Ag work is long hours under an unpredictable range of environmental conditions in general, but animal work adds in the vageries that come with a thinking animal that is frequently stronger, bigger and more numerous than you are. Every farm job I've ever had was open for several months before it was I filled it. Many times I was the only person who had expressed any interest in the job at all. Even in lean economic times you can have a hard time finding anyone to do such work, or at least have a hard time finding someone who can do it well.
If machines like this can help keep a farm from closing down, then I welcome the technology.
Dairies less than 500 to 1,000 cows are already replacing people in the milking parlour to great effect for the cows and their human handlers. Instead of spending 6 hours a day coraling cows into a parlour and milking them you can let them be milked when they feel it is necessary (great for those higher producing cows that need to be milked more than 2x/d). That frees you up to work on other on-farm issues like estrus detection, sire selection, feed manufacture, etc. that normally have to be done in the time between milkings.
Here is a question for you: Do you also lament the switch from horse drawn carriage to automobile? The car put a lot of equine breeders, carriage manufacturers, and buggie whip manufacturers (my home town is nicknamed the "whip city" because of its importance as a center of buggy whip manufacture back in the day) out of business as well, but it appears to have turned out for the best. I think the root problem of such thinking is that jobs are a zero sum game. That for a robot to do a job is to replace a human with that job never to be replaced, but the robot is manufactured, marketed, maintained, re-sold, recycled, etc. and all of those jobs still require humans.