There's a middle ground here that you're not considering (at least in the small amount of text). Vibe coders will spit out a lot of nonsense because they don't have the skills (or choose not) to tweak the output of their agents. A well seasoned developer using tools like Claude Code on such a codebase can remediate a lot more quickly at this point than someone not using any AI. The current best practices are akin to thinking like a mathematician with regards to calculator use, rather than like a student trying to just pass a class. Working in small chunks and understanding the output at every step is the best approach in some situations.

That's very true. The LLM can be an accelerator for the remediator, too, with the value-add coming from "actually knowing what they're doing", much as before.