Second, the posts before me have annoyingly underestimated the capabilities of an audience. If the performer truly knows the piece and is communicating as sincerely as possible at a deep emotional level, the audience will sense and appreciate this. Even uneducated audiences.
I'm afraid I don't quite agree with you. OK, make up an audience consisting of merely people from this honourable discussion board and similar - face it, most of us are piano nerds. We live in our little world where you are considered an idiot if you have never heard of Van Cliburn or Lang Lang. But I can tell you, none of my friends have. They are not stupid, nor uneducated, and they know very well who Mozart, Beethoven and Chopin were. They even listen to classical music from time to time. But if you drag them to a concert where a random pianist play something they have never heard before, they really cannot tell whether this is world class or just "good".
As a fiction writer I know, just too well, that most readers (and critics, mind you) find the qualities they expect to find in a book. Sometimes less, never more. Same goes for musicians. You tell people that some local talent is going to play - for free - in church this weekend and some enthusiasts will show up - there will be plenty of seats left - and I swear that even if you put Mr. Kissin Himself there, and he gives the performance of his LIFE, nobody will say "this must be one of the greatest pianists in the world". I mean, you would seem very naive if you did. Few people really dare to trust their own ears and taste.
Then, on the other hand, you must also remember that if you think you are a real
connoisseur, you are also a bit protective about your interests. You really don't want to like the same thing as the "public" do. So when you are to mention you favourite piano piece, or composer, or pianist, you just cannot mention the most popular and famous names because that would make you seem "common" or even "ignorant". You don't know more than the main, uneducated public, eek.
Well, these might be two sides of the same coin, the fear of trusting your own feelings.
OK, but I don't want to declare that we are all idiots in every situation. If you are a true music lover, you will from time to time find yourself in a concert where the performance totally enchants you, and you walk away from there with the feeling you have been in heaven for a while. You don't ask for anyone else's opinion, you are just happy to
know ... for sure ... what you just have experienced. Maybe you read a review the next day, where the critic obviously has been both deaf and dumb, and you think "what an idiot!" but you don't adjust your own opinion because of what that idiot wrote. I admit that this sometimes also happens!
But then you start to wonder why the whole world does not agree with you. Why this musician, who gave this remarkable performance, does not have millions of fans all over the world. Why they celebrate some other second rate talent instead, because he/she looks better, has appeared in "Survivor", is from the "right" country, has more likes on YouTube or whatever.
Well ... I suppose that is what this thread is about.

So this posting did probably not add anything of value to the discussion.
Personally I will never make it into the Hall of Fame, no matter if I learn to play like God. Why? Because. I. Am. Not. Slender.