You are mixing different things here. First, I did not take defense of the journal editors: the hoax was indeed a proof of lack of rigor of the journal's editor

You are mixing different things here. First, I did not take defense of the journal editors: the hoax was indeed a proof of lack of rigor of the journal's editors. That's the idea that it shows something about the whole field which is nonsense (even though Sokal said himself that this was not is point, he could certainly foresee it would have been read as such). For once, if it did, the same technique could be used to discredit a lot of fields, and not just in humanities: writing pseudo jargon and getting it accepted, especially if you have a famous name, is possible in most fields (see CS papers which were auto-generated and got accepted). In many fields, researchers are unfortunately incapable of judging much more than the surface of the arguments, for various reasons (ultra-specialization, lack of time related to the continuous growth of published papers, etc...). I am not defending it either (that's one of the reason I left academia myself), but the actual meaning of the whole hoax is much more minor that people may think from outside.