Hoarding is not even a very disruptive process, because for every miser stuffing money into his mattress, there are numerous misers' heirs ferreting it out. This has always been the case, and it is not likely to change drastically.
From cops killing innocents in their living rooms to private citizens shooting down criminal gunmen, 2019 provided some highlights of why so many Americans choose to arm themselves rather than trust in government protection.
It is true that if labor becomes more efficient, workers must find other uses for the time they now have available. But why is this a problem? Human beings have unlimited wants, and there are always new uses for human labor.