Everything is written in Python because early in on the process people realized that you are not doing anything special and are certainly not doing actual math: you are just wiring together libraries that you barely understand using a cookbook that someone else provided for you to generate results that you cannot explain so that an investor can tick a checkbox for a feature list that you never see. If you are just gluing together C/C++ libraries then there are worse languages that could have been selected, but once momentum gathered behind Python as the glue language it was hard to divert to another language (e.g. how hard the Julia folks are trying, and failing, to do just that...)