As it was already correctly noted, "automation" is not a single process, but consists of many directions, differing in speed and direction and depending on the economic capabilities of a particular society.
In some areas, "automation "leads to an increase in staff. Many countries cannot afford "automation". In some industries, "automation" is profitable, while in others it is a loss.
Projections differ because they are based on rough data . Therefore, the error is large.
The presence or absence of widespread automation (various household and industrial processes) depends on the economic effect of the automation itself. If automation is more profitable than human labor, then such an industry will be automated sooner. And vice versa. Automation of production is underway (for example, in the agriculture of the Russian Federation). But the government of the Russian Federation does not think at all about the fate of those people who have lost their jobs due to the automation of industries where they used to work. This is already a problem and it is not being solved.