Er... People do use Python to make games. Well-known ones include Eve Online, Grim Fandango, and Vampire: The Masquerade.

I take it you are advocating learning C/C++ to make games before learning Python? If so, consider why anyone who already knows C/C++ would bother embedding Python or Lua in their game... That would also be "going back to relearn a new technology when you reach a certain stage where your development capacity is limited by the tools you are using". And if you need to know both C and a scripting language to make a game, it doesn't really matter which you learn first... except that by learning the scripting language first you can prototype earlier and faster.

(And, considering the article's context of indie games, being able to rapidly prototype game designs is more important than having them perform well from the start.)