Yes she was concluding without evidence but her intuition on the matter is true, a lot of reductive approaches to socionics that generate easy answers aren't rooted in fact but rather anecdotal conjectures.
The more cultures one get's exposed to the more it becomes apparent that some values aren't type related at all. Furthermore, the more you honesty try to type people, the more you'll honestly realise that shoehorning labels doesn't work (to many contradictions and overlaps) - unless you personally want to retard your socionics.