You are citing the Tiobe index for the "most popular language"? The Tiobe index just counts the searches that include "Python". Which means that beginners who search for "leftpad python" or people who search for "python sucks" are included.
Google is reducing its Python investment. Python is just the most marketed language.
Students learning Scheme learn good habits, and Scheme will not go away.
can confirm, I learnt scheme and it allows me to do things in python that real software engineers find impressive.