For several reasons: Heat buildup, the cleaning lady/babysitter/children accidentally press the power button thus making it out of sync, and making sure that it is in the correct power on mode when the system needs to be used.

I've actually used the LG-3200A's before with the Universal Remote family of products but at the time, no discretes were published and the LG remote has the basic "power" button. Admittedly, I've not searched through the discrete section of the forum. Am I to assume that I'll find them in the Pronto area?

Thanks everyone for your responses.