Because it creates the wrong layers.

In theory, there is no reason why this is the case. For the same reason, there is no reason why juniors can't create perfect code first time...it is just the tickets are never detailed enough?

But in reality, it doesn't work like that. The code is just bad.

You are responsible for the layers. You should either do the design on your own, or let the tool ask you questions and guide you. But you should have it write down the plan, and only then you let it code. If it messes up the code, you /clear, load the plan again and tell it to do the code differently.

It's really the same with junior devs. I wouldn't tell a junior dev to implement a CRM app, but I can tell the junior dev to add a second email field to the customer management page.

English is much less expressive compared to code. Typing the keys was never the slow part for senior developers.

It does work with an LLM, but you’re reinventing the wheel with these crazy markup files. We created a family of language to express how to move bits around and replacing that with English is silly.

Vibe coding is fast because you’re ok with not thinking about the code. Anytime you have to do that, an LLM is not going to be much faster.