Of all the topics to judge LLM use, this seems the least appropriate. This is about people making software for themselves and no one else. Your opinion on the quality of their software is entirely beside the point. No one is ever going to force you to use an LLM to make personal software. And no one is ever going to force you to use LLM-generated software that was explicitely made and intended to be used only by the one person.

There are a lot of contexts where I can understand arguing against LLM use (even in cases where I might not entirely agree, I can understand the objection), but this is not one of them.

Don't think this will improve your life? Great, don't do it. But this is also the most classic case of "don't yuck other people's yum". If someone tells you they used an LLM to make some piece of software for themselves and they like it or that it improved some aspect of their life or workflow, what on earth is gained by trying to convince them that no, actually, it's not good and isn't improving their lives and is in fact garbage?