If attention is all we need then what is better

Hours of human attention

or a few seconds of AI attention?

I am not just talking about writing the code but the brainstorming that goes into it.

I mean, yes? Every engineer on my team produces better code than Claude. There are plenty of examples of excellent human produced code, so this argument always falls flat for me.

The real test is years in production. Over time your test suite grows when bugs are found and fixed, but not every bugfix necessarily gets a test, and it's very rare that a bugfix is exhaustively tested. Relying on the test suite as a directional indicator that your vibecoded rewrite functions something like the original is probably sensible. But it isn't "done" until you've run it in production for at least as long as the original. And that's where it all falls apart, because maintenance will be a nightmare. Nobody knows how the new thing works.

Deciding if two programs do the same thing is provably impossible in the strict mathematical sense.

There is often no spec, just the old code, copied with the old bugs and with new ones sprinkled on top.