No i don't think you have to make a choice. Besides, this whole "classical music language" is a ridiculous umbrella term. There's no one language for classical music. If we expect classical musicians to be able to perform music that's not only centuries apart, but also vastly stylistically different (for example scarlatti and Scriabin) why is it suddenly such an "OH MY GOD" when a classically trained Jazz pianist plays Chopin or Mozart?
No I don't agree with these ridiculous mental barriers people like to put in music. Most Jazz and classical pianists don't perform both in public like Keith because many ultimately view them as "different worlds." However, I don't believe its necessary for one to choose between either one or the other in order to become great at either one of them.
Well, feel free to disagree. But again you are imagining my "mental barriers", I am just observing things how they are. You are yet to name all those jazz pianists who can readily cross over to the SAME level of mastery in classical music (or the other way round).
I never said jazz pianists could not perform classical pieces well. Of course they can. Did you even read what I wrote? Even few classical pianists can perform the P&F on the level of VA or TN. And that was what was discussed here. I get it that you have issues with people's prejudices, but no need to take it on me.
BTW. A world class classical pianist is expected to be familiar with all those eras of music you mention and I believe building on that is partly what makes it possible for them to perform works as the one mentioned here so exceptionally well. It's not only about being able to play the pieces technically, it's about understanding the music, the references in it and how it builds on tradition...