If one cares absolutely about originality, then what is there to compete with? Competition requires sameness with the external world for comparison. The best competitions are those where people are trying to be or do exactly the same thing and one does it clearly better like a long jump. "I jumped 4 feet, well I jumped 5". The second person is better and wins the competition. So, you can say that two people could compete about who can write the weirdest songs, but then there is an external measure again. Yes, they may both achieve "weird" because it is different from a larger norm, but the moment they start competing they are at least unoriginal to the extent of their sameness to each other - being copy cats. The meme of comparing "apples and oranges" is the entire foundation of originality. Maybe people who write enneagram description don't even understand everything about humanity. Maybe some descriptions are wrong or constructed poorly with inner incompatible notions like the one described here.
There are a lot of complex dichotomies in Sx4 like autonomy and originality and also the attachments of Sx-dom. Perhaps the above falls into that same principle. When there are inner conflicting dichotomies, generalizations become even more problematic because people organize those inconsistencies in different ways to make sense of their own selves and their realities. The dichotomy of autonomy and attachment is one that makes a lot of sense inside my own self, because it has to do with a shared, reflected sense of reality where uniqueness exists in part from its perception in the eyes of another.
The descriptions of 4s are embarrassing to me which I why I avoided it for a while because I hide most of those flaws, but I also don't think some stranger out there can write a theory that defines me, so I don't worry about it that much because it's absurd to think they could. Sometimes I'm right and theory is wrong.