I agree, I feel like it might be useful for whichever programmers regularly have to search Stackoverflow and then copy paste code snippets.

Then I feel like useful code produced by this tool will have to be treated in the exact same way as a rigorous code review: going through every part of the logic and ensuring it is correct. This seems like just as much or even more work than writing it yourself (if it is written in an unfamiliar way, you might need more time to wrap your head around it).