If the degree is called "Software Engineering", then you are definitely right. But we are talking about Computer Science, which is more like an offshoot of math

If the degree is called "Software Engineering", then you are definitely right. But we are talking about Computer Science, which is more like an offshoot of mathematics, for studying computation and information processing. Complexity, tradeoffs of time and storage, information representation, search, analysis of algorithm correctness and efficiency, etc. Putting together large production applications for business use cases has little to do with that.