This learning time that you welcomed is what you will now miss out on. The LLM gives you an answer, you don't know how good it is, you use it, and soon enough, if running into a similar issue, you will need to ask the LLM again since you were missing out on all that learning the first time which would have enabled you to internalize all the concepts.
It's like the regex engine example from the article. An LLM can create such a thing for you. You can read through it, it might even work, but the learning from this is orders of magnitudes less than what you get if you build this yourself.