I read the comments you linked and don't really think they literally believe Rust is magic. I dunno though I guess I could imagine a vibe coder tacitly believing that. Not saying you're wrong. I just think most people say that tongue in cheek. This saying has been around forever in the Haskell community for decades. Feels like a long running joke at this point
Rust isn't magic, but it has an incredibly low software defect rate. Google published a few studies on this.
If Rust code compiles, it probably has a lower defect rate than corresponding code written by the same team in another language, all else being equal.
There is no hint of irony in the linked posts.