You need both. It's unfortunate that we separate out the two. It wasn't until the second semester of my third year of my accounting degree that we actually had a project where we would get fake checks we had to enter into the books, fill out, and put in a folder called "mailed." This should have been day 1 and we should have learned what it was we were doing as we were doing it. And this should have prepared us for some sort of internship.

On the other hand, I've met coders who somehow have managed to completely miss very basic CS concepts because they learned the entire thing ad hoc as they needed it and they never realized that they needed Big O, or that they needed to learn how modulo works.

For me, I flunked out of math my entire life until I learned coding and was able to find the answers to "what is this used for?" so I could put it into context. Book learning is good, but it's easier (at least for me) if you have a scaffolding of experience to know where to put each new thing you're learning.

Never neglect either!