I would even go as far as saying that being able to self-study on your own is an essential life skill, up there with learning how to read/write. That's how important it is. You need to learn how to do it. It is important. Personally, I think overtime it will become easier to self-study topics due to advancements in edtech technology.
I worked for years as a programmer before going back for a degree, and I've hired and worked with many people with and without the degrees.
I've yet to run into someone who self studied their way through the equivalent of a CS degree. I'm sure they exist, but they're pretty damn rare.
What you are talking about is essentially programming as a trade. That’s not what a CS degree or any degree is for, really.
The best programmers have a deep understanding of how computer software works.
That's a value judgement that is not reflected in the market, fwiw.
CS moves slowly, tooling moves fast.
Can is the key word here. Most people don't have the discipline to go through a CS curriculum on their own.