Python is not technically superior to other languages enough that you can rhetorically ask that question. It’s main advantage is the ecosystem and network effects. If a bunch of people, especially the people who work on numpy, scipy, etc., decide to work on developing libraries for other languages like R and Julia, the data science ecosystem would switch over in a few years. Similarly for other fields people might switch to languages like Elixir, Haskell, OCaml, Go, Swift, Scala, Ruby, Kotlin, etc.
