The irony of this comment, given that there is precisely nothing about Python itself as a language that makes it particularly suitable for "anything remotely scientific", is thick enough to spread on toast.
I can see the validity of such an argument for languages like R or Matlab or Julia (EDIT: or Fortran), wherein the languages were designed with scientific use cases in mind. Python is not in that category; it's rather in the category of Perl (EDIT: and not Fortran): languages that happened to be useful to scientists by happenstance, and around which a library ecosystem developed in support of that usefulness. No fundamental reason why Javascript would somehow be ineligible if Python is eligible.
I can see the validity of such an argument for languages like R or Matlab or Julia (EDIT: or Fortran), wherein the languages were designed with scientific use cases in mind. Python is not in that category; it's rather in the category of Perl (EDIT: and not Fortran): languages that happened to be useful to scientists by happenstance, and around which a library ecosystem developed in support of that usefulness. No fundamental reason why Javascript would somehow be ineligible if Python is eligible.