This is true, but there's a lot to be said for native libraries which can be used more naturally. More important for things like frameworks, etc. than algorithms / highly technical code. e.g. using the Python wrapper for OpenCV is fine -- a little bit jenky but it works, and I definitely don't want to write those myself if I'm focusing on a product. On the other hand, would you want to use a wrapper for a web framework written in C? Probably not.