Did demand for programmers go down in the transitions from pure binary to assembly language, and from low-level languages to high-level languages?

It just became more feasible to build profitable products/services that solve larger products, which would increase the demand for programmers. As long as people/companies want to make more money, they will keep moving on to more ambitious projects that have just become technologically/economically feasible. In aggregate, they will not stop at the previous technological/profit level, downsize by firing all but the absolute minimum of programmers, and stay content with their stagnating income.