It is, but when people bemoan lack of meaning/purpose they're just talking about feelings. It's a sensory thing, the rationalizations are just an attempt to explain and make sense of it.

We're bad at predicting what makes us happy and even worse at making sound judgements through negative emotions. Those in the middle of such an experience don't want to believe that their habits are exacerbating or responsible for their problems, because change is uncomfortable. They want to continue to feed addiction.