no no Aaron, the recordings are too complicated for an average singer and pianist to perform.
This is Scott saying "don't confuse me [Scott] for average."
nu uh...when I say average I mean, my piano teacher's singing pupils, they always sing with the melody played on the piano. And so do most other vocal teachers I know, they don't let them try singing on their own till they are comfortable.
+
Lot's of ppl in my class when they play a song, they never sing with the melody played with the bass + melody on their instrument. Even Buskers do it.
To sum it up its been commerically adapted to help singers sing, rather than help performers perform.
Funny story...I tried performing with my cousin...I think it was NMNI, but it took her a while to get it, because instead of playing the IE SCLTNS version I played my version of the recording and....UGH i had to let her sing with me playing and Delta playing a couple of times before she GOT where the melody came in.