I'm not sure to what extend you are being facetious, so I'll take it at face value. Rust doesn't particularly attract "crazies", and nor are software developers

I'm not sure to what extend you are being facetious, so I'll take it at face value. Rust doesn't particularly attract "crazies", and nor are software developers mostly crazies. So, I believe your criteria is exceptionally bad at filtering those kinds of developers out. Hiring good people is challenging enough as it is without doing the job poorly. My advice, unwarranted as it is, is to revise your preconceptions.