It's because many people mistake learning a few programming languages as a computer science education. In fact, a degree in computer science education does not

It's because many people mistake learning a few programming languages as a computer science education. In fact, a degree in computer science education does not even include these things - they are assumed to be easily picked up in a students own time - just as they are in other degrees that require programming (math, physics, etc). What a (good) computer science degree teaches is how to think, reason about a problem, and other theoretical tools useful in computation. It is more like a type of math than any thing else.