He was quoting the claim you made. Shouldn't you have your own justification for it? Which tests did you run with both Fable as well as the best human programmers?

I “try your suggested experiment” several times per month at work. Usually when I’m on call.

It’s great at being a search engine for our docs and communications. It can also find bugs quickly in small repos with static analysis and coverage tools.

But when it comes to larger projects or interconnected systems, the time it takes to correct its “assumptions” is often longer than the time it takes to solve the entire problem myself.