This is not convincing. Of course, software developers should learn more than one language, preferably of different levels and paradigms. There is however some special thing what one likes to do daily, and quite a lot - a matter of taste. For example, Julia, R or Python for "data science" and research. Or just plain old C or Fortran. As for Helsinki, it's hard to find good Python developers here. And who cares about bad ones. In any language.