I'm still not convinced and I'd say that the case is nowhere near as clear as CloverDragon03's example of squares and rectangles would make you believe. We have clear definitions for Square and Rectangles and in the case of the Selfless State we have no statement of it being separate from Transparent World and the only reason we even have an official term for it is Akaza who only had a faint feeling of it existing before fighting Tanjiro. The distinction between the conditions for acquiring the Selfless State and Transparent abilities is also rather fuzzy. The foreshadowing in Rengoku's doesn't help either. I still understand that there are reasons for thinking that they are separate and if nobody else has any issues, then I won't stop them from applying this.
It's about separating the Selfless State (Resistance to Enhanced Senses, Precognition, Extrasensory Perception) and Transparent World (Perception Amplification, Information Analysis, Enhanced Sight, Analytical Prediction, and Enhanced Precognition) and treating them as separate abilities.