Television watching is like smoking, in that the psychological harm it does to a person in terms of guilt, degradation, and demoralization, probably outweighs any other harm.
Simply looking at the night sky and the infinity of space can be enough to awaken us to our true nature. Perhaps this is the very reason we invented television - to keep us indoors, to glue our eyes to, and prevent them from straying.
And perhaps this is also why so many of us live in cities, where atmospheric pollution and bright lights render the stars invisible. We huddle together in these, which we call the great cultural centres, as though digging ourselves a hole to hide in - while all around us the magnificence and glory of Nature go unnoticed.