Reply to Rock Band 3 - Good Intro to Piano for Someone Interested in Producing?

I have been trying to learn more about music theory because I am interested in producing, and after playing around with the new Pro Piano mode in Rock Band 3, it seems like it might be a good way for someone who is interested in producing to learn scales and different chords. I've read that it won't "really" teach you piano because the keyboard is only 25 keys and most of the parts are played with one hand, but at the same time, if you're only interested in learning enough piano to produce your own music in a program like Ableton, wouldn't this be enough?

I have tried a more traditional approach - getting lessons and learning classical pieces - which I'm sure is the ideal way to learn music. But it also seems like I am going to spend a lot of time learning stuff that is unnecessary for me because I'm not interested in piano performance - I'm only interested in gaining understanding. Thoughts?