The world was created in a certain way. If you want medical doctors, if you want engineers to build bridges and sewer systems, if you want computer scientists (to create computerized responsa projects among others), if you want soldiers to defend you from those who would kill you, if you want HVAC people to kewep thoses Yeshivas warm throughout the New York winter, if you want qualified people to take care of our invalids—etc etc–
then you need professionals who must train for their jobs, keep up with the current knowledge, and then be available when you need them. This was the case since Eden, and certainly has been so as long as there was a Jewish people. The interdependence of society is simply the way that the world was made.
One can wish that things were otherwise–but consider it insane?
These are as much the “real things” in life as Torah–Torah does not exist in a vacuum. This is the way that the world was created.