My gripe (in agreement with DinasourTales) is that mature people have a mature musical mind and ALSO have alot to offer artistically. Audiences much prefer a moving experience (in some way) than a boring flash one. I know people who are not by any means music experts, who know when they like something but dont necessarily know why.
it discusses among other things - why pianists who have no hope of being professionals still are motivated to participate in this kind of contest.
well they are also likely to be a fairly crap standard as they would consist of a slew of mediocre could-have-beens.