The reason for my wanting your e-mail was that this discussion is somewhat off-topic, and sooner or later likely to be erased by the administrator (of course, I realize there is an "Off-Topic" section on this forum, where people exchange posts about politics, among other things). So I thought it best to exchange further messages in private.
As is common knowledge: whoever wins a piano competition is not necessarily the *best* contestant in the field; rather, he's the one who simply offends the fewest jurors (and you never know what kind of day any one of them had, what he ate for breakfast, whether he holds a grudge against your teacher).
In the documentary coverage of the 2001 Van Cliburn, there was a heated debate after the second round of the competition: one of the semi-finalists (name withheld) was deemed to be the best of the 12, by three of the jurors; three other jurors thought him the WORST. I'm not sure if he made the finals ...
Also common wisdom is that if Vladimir Horowitz were alive, and a young man participating in any of these major international competitions, he not only would not win but also, probably wouldn't even survive the first round.
Indeed, Evgeny Kissin is a world-class concert pianist who never participated in, much less won, either the Chopin, Tchaikovsky, the Queen Elisabeth, or the Van Cliburn (for all practical purposes, I guess those competitions could be called "The Big Four").
Well, judging is not supposed to be objective, and most reasonable contestants understand that winning is not about being judged the *best* (Johan Schmidt of Belgium said, in 1993, that "I'm competing against myself only" -- unlike an athlete who competes in sports).
Speaking of outstanding amateur competitions, there actually are several of those: there's an impressive YouTube clip of Rupert Egerton-Smith (a Briton who works as a business consultant in London) performing Ravel's Gaspard de la Nuit (one of those overdone show-off pieces, along with Stravinsky's Petrouchka, at international piano competitions). Many of these contestants actually underwent serious, formal training -- and even have the goods to pursue professional concert careers (but have chosen not to).