The more senses we can employ in an activity, the more immersive it will be. Sound plays a massive role in how we perceive things.
Tolito is probably bored with gaming hence his silly statement that music is not that important."
However, RockBand is a GAME. It is really just a glorified karaoke. By no means is it going to teach you to master a musical instrument on any level of competency.
Being a musician myself I know that it takes years of dedication and practice to learn to play an instrument and sing "unaccompanied". (It is one thing to sing along a piece of music, something entirely different to MAKE music)
So please, do yourself a big favour and stop deluding yourself into thinking this video game can teach you to be a musician. It aint gonna happen."
Just not current times please, that just does not appeal!"

Secondly, I have been playing TW2 on High settings on my PC without any problems."