As a counter-point, here are three examples of highly successful individuals in the tech industry with an M.S. in computer science as their highest degree:

- Soumith Chintala (https://www.linkedin.com/in/soumith): Co-inventor of PyTorch; Distinguished Engineer at Facebook AI

- Jacob Devlin (https://www.linkedin.com/in/jacob-devlin-135ab048): Inventor of BERT; SWE at Google AI

- Yuxin Wu (https://www.linkedin.com/in/ppwwyyxx): Lead developer on Detectron2; SWE at Facebook AI

If we include successful entrepreneurs and CEOs, the list becomes larger still.

Of course, these examples are cherry-picked, but I'd be careful with your assumptions.

Many people who pursue Master's degrees in the U.S. are international students who didn't have the luxury to do their undergrad in the U.S., a large number of whom have gone on to great success in the tech industry. At the high end, M.S. in computer science grads represent the best and brightest of three groups: international students, PhD dropouts, and those curious enough about CS to pursue it at the graduate level.