My experience using LLMs is similar to my experience working with a team of junior developers. And LLMs are valuable in a similar way.

There are many problems where the solution would take me a few hours to derive from scratch myself, but looking at a solution and deciding “this is correct” or “this is incorrect” takes a few minutes or seconds.

So I don’t expect the junior or the LLM to produce a correct result every time, but it’s quick to verify the solution and provide feedback, thus I have saved time to think about more challenging problems where my experience and domain knowledge is more valuable.