If you read what they produce, learn to debug it, and make it an active learning experience, then yes, they are useful. If you just copy/paste code and errors b

If you read what they produce, learn to debug it, and make it an active learning experience, then yes, they are useful. If you just copy/paste code and errors back and forth, then no, they are harmful. No matter what purpose you are trying to achieve, the success of a tool comes from applying the correct tool, to the correct problem, in the correct way. LLMs are kinda cool that they are flexible enough to be a viable tool for many things, but those other two criteria are up to you.