The part of this thread's subject line that is in quotes is something that my teacher has said to me a couple of times. "Let your fingers do the work."
Specifically, he means that when I am using sustain pedal in a piece, to not allow my fingers to "let up" from the keys too early; that is, to try to play the piece as if I wasn't using pedal at all, so that my fingers are essentially on the keys for as long as possible and I am not allowing the pedal to "do the work."
I hope this makes sense. For example, if a piece calls for a legato arpeggiation of a C major chord (let's just simply say one octave, C-E-G-C, all in one hand), and has a pedal marking spanning the arpeggiation, I can either (1) play the arpeggiation in a legato manner, keeping my fingers on each key for as long as possible before moving to the next, or (2) just tap each key and quickly lift my fingers after each note. Using the pedal, each method could be made to sound identical...
This is a very simplistic example, but I hope it illustrates what I am getting at. I can certainly understand how it is important to "let my fingers do the work" in some circumstances--for example, if I need to pedal something in the left hand while keeping a melody in the right hand crisp and clean--but in others, I fail to see why it matters at all how you strike the notes if the pedal will ultimately make the passage sound the same, no matter how you do it.
I'm not trying to voice an opinion here; I just want to understand why this is a good practice. Please offer any insight you may have. Thanks!