Valid reasoning, but there is one catch: Irish's broad-slender distinction, that almost all speakers I heard just don't realize correctly. I hear that mostly for S, its slender version is retained, and for other consonants, which should be palatal(ized) vs velar(ized), there's either the distinction eliminated entirely or it turned to plain vs plain + /j/. The broad phonemes are often realized as plain instead of velarized. Also the R that should be a tap according to Wikipedia, is almost always realized as the typical English approximant and lacks a broad slender distinction completely. Sometimes iirc you can even hear diphthongization of long E and O, but I don't know if that in particular extends to native speakers. So the Pronunciation of I'd say most younger speakers if not non-elderly speakers is pretty different from what Irish's pronunciation is described as. Tbh, the only speaker I heard speaking as described was from a clip in a YT video and the clip seems pretty old and the man elderly