I wouldn't trust an LLM to produce any kind of programming answer. If you're skilled enough to know it's wrong, then you should do it yourself, if you're not, then you shouldn't be using it.
I've seen plenty of examples of specific, clear, simple prompts that an LLM absolutely butchered by using libraries, functions, classes, and APIs that don't exist. Likewise with code analysis where it invented bugs that literally did not exist in the actual code.
LLMs don't have a holistic understanding of anything—they're your non-programming, but over-confident, friend that's trying to convey the results of a Google search on low-level memory management in C++.
I'm closing in on 30 years too, started just around '95, and I have yet to see an LLM spit out anything useful that I would actually feel comfortable committing to a project. Usually you end up having to spend as much time—if not more—double-checking and correcting the LLM's output as you would writing the code yourself. (Full disclosure: I haven't tried Copilot, so it's possible that it's different from Bard/Gemini, ChatGPT and what-have-you, but I'd be surprised if it was that different.)
Here's a good example of how an LLM doesn't really understand code in context and thus finds a "bug" that's literally mitigated in the line before the one where it spots the potential bug: https://daniel.haxx.se/blog/2024/01/02/the-i-in-llm-stands-for-intelligence/ (see "Exhibit B", which links to: https://hackerone.com/reports/2298307, which is the actual HackerOne report).
LLMs don't understand code. It's literally your "helpful", non-programmer friend—on stereoids—cobbling together bits and pieces from searches on SO, Reddit, DevShed, etc. and hoping the answer will make you impressed with him. Reading the study from TFA (https://dl.acm.org/doi/pdf/10.1145/3613904.3642596, §§5.1-5.2 in particular) only cements this position further for me.
And that's not even touching upon the other issues (like copyright, licensing, etc.) with LLM-generated code that led to NetBSD simply forbidding it in their commit guidelines: https://mastodon.sdf.org/@netbsd/112446618914747900
Edit: Spelling