Vibe coding doesnt mean the author doesnt understand their code. Its likely that they don't want carpal tunnel from typing out trivial code and hence offload that labor to a machine.
You do realize that it's possible to ask AI to write code and then read the code yourself to ensure it's valid, right? I usually try to strip the pointless comments, but it's not the end of the world if people leave them in.
Vibe-coding as originally defined (by Karpathy?) implied not reading the code at all, just trying it and pasting back any error codes; repeat ad infinitum until it works or you give up.
Now the term has evolved into "using AI in coding" (usually with a hint of non rigor/casualness), but that's not what it originally meant.
AI assisted coding/engineering becomes "vibe coding" when you decide to abdicate any understanding of what you are building, instead focusing only on the outcome