It depends. For a task I know well the LLM is often much worse. If I'm being asked to do something brand new, the LLM does speed me up quite a bit and let me build something I might have gotten stuck on otherwise. The problem is that although I did "build the thing," it's not clear I really gained any meaningful skills. It feels analogous to watching a documentary vs. reading a book. You learned _something_, but it's honestly pretty superficial.
Because when you simply “read” you’re not necessarily learning. The illusion of knowledge is real, where you nod in agreement that you understood something but when it’s your turn to do it, you have no idea how to. You need to do something yourself to actually learn it, and it involves struggling, frustration, eventually insights etc.