I gotcha. I've tried to learn guitar no less than three times. The last time was Rocksmith. It's just not something I'm going to be able to learn to do. It was fun in the beginning, but then you hit the part in the learning curve where it starts to get tough, and progress slows down. At that point it felt more like work, and less like having fun. That's not what I play video games for.
Plus, while I played Rock Band, I was never a master. I couldn't play the hardest difficulty level for any but the easiest songs. And to be honest, the most fun I have with rock band is when I play guitar, sing, and rope someone else in the family to join me for a few songs. None of those are options with Rocksmith.