"Fundamental" was not an important qualifier in either of your posts. OP did not define what that meant in their context, and therefore it's not fair to nitpick

"Fundamental" was not an important qualifier in either of your posts. OP did not define what that meant in their context, and therefore it's not fair to nitpick based on that alone. They might as well have said "ticklish" for all the difference it made to their overall point. If that's really what your whole post is about, why take the take to argue definitions? What does fundamental mean to you exactly?