Well, he could have been more diplomatic, but in a Forum that is historically heavy on technique and in a thread that is specifically technique based, posts like this are not out of bounds.
Sure, in carving there is tons of room for individual "style" and "expression". However do not confuse the terms <i>style</i> and <i>technique</i>. In style, there are no fundamental rights and wrongs. In technique, there are. We now know that carving with the knees purposely forced together all the time is simply wrong, just as it now is in skiing as well.
Presumably someone posting technique questions wants to improve theirs. Otherwise, they are flame-baiting. They should enter these threads just as they would an on-hill lesson - with an open mind, and some humility. They should be ready to hear what they are doing wrong, and also perhaps that their equipment is obsolete, and not take it personally. There is absolutely no use for "hey if it feels good do it, man" posts in technique threads.