I like how you presumably read the whole thing and still took away nothing from it but, “Childfree people think only about themselves.”
If anything, increasing automation means that we’ll need fewer, not more, people entering the workforce as the century progresses. Heaven Knows, the world’s bosses are constantly using automation to remind us all that we don’t deserve living wages, shorter workweeks, decent healthcare, and the like. They do their level best to treat us like machines as it is.
As for families moving here to start a new life? OK. Support a robust, humane immigration policy and strong workplace rights. Problem solved. :)