the beginners who try it are constantly asking questions about why their generated code doesn’t work
Because it ain't here to generate all their code for them. It's a glorified autocomplete and suggestion engine. When are people gonna get this? (not you, just in general)
I use CoPilot myself, but if you have absolutely no idea what you're doing yourself, you and CoPilot will both quickly hit a dead end together. It doesn't actually understand what you want the code to do. Only what is similar to what you have already written or prompted for, which may be some garbage picked up from a noob on the web somewhere. Books and research using your meatbrain are still very much needed.