You haven't read the linked article, because the author does adress this. They point out that Peterson specifically does hide obvious and banal ideas in his sentences, so that when people finally find some blatant truths in his word salad, it makes it seem like the ideas are much more profound than the platitudes they actually are.

Here is a quote from the article:

The inflating of the obvious into the awe-inspiring is part of why Peterson can operate so successfully in the “self-help” genre. He can give people the most elementary fatherly life-advice (clean your room, stand up straight) while making it sound like Wisdom.

And remember the author actually shows this with numerous in-depth examples from Peterson's writings. A better editor would do nothing, because Peterson writes like that with intent, the intent being to disguise what a cultish hack he is.