Stephanie Zacharek indirectly makes TWO very good points here:
1. Only active filmmakers should be allowed to criticise filmmaking in-depth - just like only a cook knows enough about cooking to criticise someone else doing it.
2. There's a category of elaborate writers out there who just criticise to show how savant they are. That's pretty pathetic, and you usually can tell from their up-and-down metaphorical style and highly specific analogies only they understand.