I don't think "insane to not believe in vibe coding" is a fair summary of https://fly.io/blog/youre-all-nuts/ - that post wasn't about vibe coding (at least by its I-think-correct definition of prompt-driven coding where you don't pay any attention to the code that's being written), it was about AI-assisted engineering by professional software developers.
It did have some swear words in - as did many of the previous posts on the Fly.io corporate blog.