> The advantage is obvious. People who know and/or enjoy Python can get into web dev without having to fuss with a new language. It’s really that simple.

All web API docs are written for Javascript. Knowledge and practice of Javascript is mandatory for front end development at first place.

If that’s what you are doing then most of how you write python can be done in javascript. The languages are not too different except for superficial syntax stuff. You also inherit the problems that come with compiling and also in general the lack of web-oriented packages that javascript offers.