@vvvvvv6 The perfect reply!
More seriously, honestly, I will admit that I do care about what others think of my system, and this is in part because there are things I do not know about audio and also about critical listening. There are people on this forum whose advice has had a major impact on the improvement of my system -- after I verified it, of course. AND, there are local people who have listened to my system over the years and made suggestions which improved it -- verified by me.
How have people helped me? Here are a few:
Vocabulary and attention: By naming what they heard—"sibilance," "midrange bloom," "sound stage depth"—they gave me conceptual tools to parse my listening experience differently. This vocabulary directs my attention to aspects of sound I may have heard but not consciously distinguished.
Fresh ears: Sometimes they noticed fatigue-inducing harshness, boxiness, or unnatural timbres that familiarity made me overlook.
Comparative listening: They suggested A/B tests—speaker positioning, toe-in angles, acoustic treatments—that helped me hear differences I was missing.
Listening tracks: Their musical suggestions revealed different system characteristics. This helped me identify weaknesses my typical listening wasn't exposing. (E.g., the "french horn test" -- that horn's complex overtones, dynamic range, and tonal warmth tested my system's balance, distortion, and whether my midrange sounded natural or artificial.)
Room acoustics: Outsider's perspective helped me "get outside my head" insofar as they commented on how my room was affecting bass response, reflections, and imaging in ways I became desensitized to.
Unlike you, I'm not self-sufficient as an audiophile. Drawing on others for advice about gear, acoustics, and even listening has improved my system and augmented my listening enjoyment by huge leaps.