Tower of Babel – What is the danger of one slave? A few things

Who said there is a benefit? It just turned out that way. The same benefit as there is in the appendix (at least it is accepted today that it has no benefit. Although some try to point to different benefits, and so on). It just turned out that way in evolution and that is why it is here. I would add that the biblical story of the Tower of Babel suggests that this is useful in dividing human forces and tendencies. See the Netziv commentary there.