A master's in CS can teach you interesting and very useful things, like how OS kernels, distributed systems, networks, and microprocessors work. A master's in EE will teach you things like signal processing and analog circuit design as well. Knowing these things helps you to design, build, and evaluate systems that are reliable and efficient.A master's in science helps you understand how the physical world works and how to reason quantitatively as well as qualitatively. A master's in humanities gives you knowledge and understanding of human culture, such as literature and the arts, and history - subjects that can be deeply enriching and can provide insights that transcend disciplines. A master's in social science will teach you about how humans behave in groups and how they interact with their environment, and about statistical analysis.
Writing a master's thesis will also teach you a lot and make you a better writer - if you actually write it yourself and don't rely on AI.
Any of these degrees will certainly qualify you to be a more interesting, knowledgeable, and insightful barista or Uber driver.