It's all about branding. In most settings, yeah, it'd be labelled as weird. But if we call "sitting and staring at the wall" something like "meditation" it becomes all cool and esoteric. :-) (I say this as one who spends at least 30 minutes a day sitting and staring at a wall.)
Point taken, though. I guess I have enough solitary activities that I regularly partake in that I never gave thought to those that might need to actively seek out such activities.