Not disputing it, but people don't pick Python because they need the fastest language, they pick it for friendly syntax and extensive and well-supported libraries. I loved Lisp, but none of the lisps have anything like Python's ecology. Julia, even less so.

People don't pick languages for language features, mostly. They pick them for their ecosystems -- the quality of libraries, compiler/runtime support, the network of humans you can ask questions of, etc.