They aren't, though.

As a SE with over 15 years' professional experience, I find myself pointing out dumb mistakes to even the best frontier models in my coding agents, to refine the ouput. A "coder" who is not doing this on the regular is only a tool of their tool.

(in my mental model, a "vibe coder" does not do this, or at least does not do it regularly)

Well, the term lacks clarity and a shift of meaning.

If you define "vibe-coders" as people who just write prompts and don't look at code - no, they ain't coders now.

But if you mean people who do LLM-assistet coding, but still read code (like all of those who are upset by this change) - then sure, they always have been coders.