I do agree with you here littledog,
It "is" considerably harder to get a truly great recorded sound when using a so called *REAL* live instrument, such as a piano, accoustic guitar, etc....or even vocals for that matter....
however, where do WE draw the line between REAL and electronic/proccessed, etc????

Mentally speaking
Is an electronic keyboard or synth any LESS a 'real' instrument....than a piano, cello or trumpet - LOL!!!!!
What about an electric guitar (which also happens to be harder when recording with and has some of those added elements you mentioned above) would this fall somewhere between the two?...
I recognize that when it comes to *RECORDING* it is somewhat 'easier' to maintain a clearer/better constant input signal when playing an electronic keyboard, than lets say, my electric guitars...and especially the accoustics.....
BUT, in the end it almost appears a little bit of 'snobbery' to say that some instruments are more REAL than others....simply because of the technology (or not) involved....
I guess there 'is' a bigger 'trial and error' component associated with 'real' instruments...that may or may not have a DIRECT feed in..., so to speak...
Geeze, now I'm getting philosophical - again
KEV