"So are you saying recording in studio without any midi editing will be inferior?"
I'm sorry that I can't make my point more clearly. Midi-editing is neither superior or inferior; it is merely a more efficient way (in my view) of accomplishing what has ALWAYS occurred in the recording studio: audio editing.
I mean this in the following sense:
"Editing" is almost always "splicing", removing the unwanted sections and substituting the wanted ones. I understand from the engineers that do this for a living that as many takes as the pianist can AFFORD (studio time is money) will be made, and more often than not the final recording will consist of a splicing together of these takes.
The process used to be accomplished with physical splicing of tape. That method was replaced by digital splicing. Now there are studios equipped with MIDI recording Steinway, Bosendorfer, and Yamaha player pianos; so the process can be done even more precisely via MIDI coupled with piano-replaying the "corrected" performance
(not pianist-replaying but the midi recording being replayed by the player-piano).
Do I think that the "corrected" performance is "better"? Not necessarily, obviously, regardless of which method is employed: tape splicing, digital manipulation of wave files, or MIDI coupled with replaying the performance via Disklavier.
The question of "is the edited performance "better"?" is up to the performer, engineer, and producer, all of whom I assume have to approve the final result before the CD is pressed, or the performance is digitally released online.
The really important distinction, I think, is between LIVE and RECORDED. The latter I think we can say with certainty, is ALWAYS, of necessity, something ARTIFICIAL. Again, that's the case regardless of which of the above editing methods is employed.
One could go out on a limb, I suppose, and say that the MORE editing or splicing that is done, the more ARTIFICIAL the recording, again, regardless of the method of editing.
Personally, I'd want to be a bit clearer about what "artificial" means before making that particular philosophical leap.
A final note: even "live" recordings appear to get edited from time to time. Bad cell-phone events are edited out. But performance snafus are as well.
Case in point: Angela Hewitt in Toronto, a number of years ago, playing all of the WTC live, in concert. She got completely gummed up, completely lost, in the latter half of the Book 1 B minor fugue (#24). In the CBC (Canadian Broadcasting Corp) radio version of the live concert (which I attended), the damage was somehow repaired!
Postscript: Working with MIDI and a piano SAMPLE, which is what I've done with the WTC in this instance is ultimately a kind of MIDI super-editing. It is NOT a performance. That raises the question many people find perplexing. If I were to have the benefit of expensive microphones and, say, a concert Fazioli or Hamburg Steinway equipped with the latest and greatest player system, I could have recorded my work using exactly the same equipment that can be used to MIDI edit and splice piano performances at Disklaviers.
So the question arises: at what point does a "performance" that has been super-edited become something OTHER than a performance by the original pianist? For some listeners, ANYTHING other than a bona fide LIVE performance is musically suspect. For others, it depends how much ex post fact editing has been done.
These are questions of PROCESS, however; not questions of PRODUCT. If I hadn't attended the Hewitt WTC concert, it would never have occurred to me that editing had occurred. The "product" seemed just fine, but I was ignorant of the "process."
These things don't matter to me, personally. But they matter a lot to others.
Concerning the accuracy of player pianos. I saw a performance replayed by a Yamaha with a small group of listeners on stage at Koerner Hall in Toronto. I couldn't tell the replay from the original (which had been performed minutes earlier). Impossible, and that was many years ago. MIDI "2" has, I'm told, over one thousand velocity layers, not the old "127". And the player mechanisms are much more sophisticated. So I'm not convinced that accuracy of reproduction is a limiting factor.