You asked "Isn't it well-known that PhD makes only sense for people who want career in research?" and I answered with a counterexample. There are many places w

You asked "Isn't it well-known that PhD makes only sense for people who want career in research?" and I answered with a counterexample. There are many places where a PhD makes sense for a career in industry. And if you think an oversaturated job market pushing people into doing PhD's they don't need for the actual job isn't a problem for "the PhD system" then I call you short sighted.