I think that's an overly strict definition.

A CGI film is still a CGI film even if artists at the studio hand-paint certain objects in certain frames.

A Python program is still a Python program even if it calls out to C code for a handful of key functions.

I suspect most people would consider an AI generated image to still constitute AI art even if the creator touched up a few things in Photoshop.

It has to be a strict definition because that is the main point of vibe coding, it is for people who don't know how to program.