Exactly. I'm a self-taught mostly-backend web developer and so I know a variety of related languages, I know the standard tooling and best practices for both f

Exactly. I'm a self-taught mostly-backend web developer and so I know a variety of related languages, I know the standard tooling and best practices for both front and back end, I know things like OO patterns and project architecture so that I can create sensible structures when writing a new system, and I know enough about the ops side of things to be able to do a lot of that when needed. All these things are practical and necessary to my day to day work. On the other hand, I do not know basic things CS BS-havers learned, like how to implement a bubble sort from scratch, because that is not something that has ever been relevant or is likely to ever be relevant to my day to day work (outside of one-off interview questions from companies I likely don't want to work for anyway if that's their interview process). Algorithm design and high level math is the foundation of CS as a science and as a degree, but it just doesn't factor that much into writing code in a high level language for an established platform like the web. And having a CS degree is no guarantee that you won't put an expensive call inside a loop or write monolithic functions or any of the other terrible practices I've had to train out of junior devs.