I’ve had friends say to me that understanding music theory has made music less fun for them because they can’t hear it without analyzing it.
That’s never made sense to me, because subconscious analysis is how we identify different songs in the first place.
A brief example. The Rolling Stones song “You Can’t Always Get What You Want,” is basically a I-IV-I-IV progression for 90% of the tune. I know that, and I hear that, I but I don’t hear I-IV-I-IV, I hear notes that are in a pleasing pattern, and the words I use to identify those notes are “one chord” and “four chord”.
Music theory is about being able to communicate about things our bodies understand already.