You say that the common depictions of scissoring is not representative of tribbing as a whole. Which I completely agree with. Because tribbing is a word for “rubbing the vulva against something for stimulation”.
But that doesn’t mean that scissoring isn’t real. It’s a specific form of tribbing. And there obviously are people who have done and enjoyed that, and are now confused why people tell everyone that it isn’t real.
Sure, it may not look like the common porn depiction. But it may surprise you that the porn industry isn’t really good at representing actual sex in general. And just because you yourself don’t enjoy this position doesn’t mean others no not as well.