Those have existed for quite a while now. For smaller projects it is cheaper to get a human.
Cheaper, for now.
If you can get him in time, plus are willing to risk unknown quality of his work. Reliable professionals tend to be booked long in advance, at least where I live.
Depending on the task, a human doing it may be highly discouraged by H&S regulations, or the insurer.
Even on individual small building sites in France I'm now seeing mini-diggers instead of human shoveling, everywhere, or tile elevators (for a 3 man roofing team!) instead of the stereotypical exploited immigrant manual labourer. These are justified by insurers quoting such a high price for covering the expected accident and long term health costs of human shoveling or tile carrying to roofs that buying the machines is cheaper.