Because it’s not about the jobs, it’s about what salary people will settle for.

If a family had to make X to live comfortable before, now you can do so with each of you making half that as long as it adds up to X. People shouldn’t settle for less, but they do even if only a few percent… where before people didn’t to the same degree because it had more immediate impact.

This in turn is one of the several market forces that has contributed to deflated wages.