My issue with that approach is that it's easier for me to write code than to read code and grok all the subtleties of one approach vs another.

Writing thousands of lines? I'm actively thinking about the specific method.

Reading thousands of lines of someone else's code? I might fall into a more passive mode and miss a problem.

I am more likely to do the reverse: write it myself, have LLMs summarize it or suggest how to test it/break it/whatever.

In many situations a sufficiently-described statement of "here is exactly what I want the code to do" is not significantly easier to write than the code itself. Especially when the AI is doing the annoying tedious bits through autocomplete suggestions, vs letting it try to do the whole thing based on a sufficiently-described prompt.