Good news for me then
I spend a lot of my time day dreaming. consequently when people ask what I've been doing (usually at home rather than work) I don't have a great deal to tell them.
But I always new there was something inherently beneficial to just staring at the wall imagining stuff. I come up with many ideas that way, usually I don't have the skills or motivation to implement any of them but nonetheless it's got to be better than staring at the TV with your brain switched off.
Besides, daydreaming is fun. Anyone who says otherwise is proving they have no imagination.