It is a common misconception that the whole point of Meditation is to empty your mind but don't get me wrong clearing your mind of distracting thoughts is certainly a part of meditation. It is a tool of consciousness that allows you to achieve state is known in Eastern tradition as "one-pointed concentration," and it allows you to focus intently and without distraction upon just one thing. this is from Michelle Belanger this her opinion. I use it to gain gnosis, ritual, Visualization and on union with higher power but can be uses to relive stress by not thinking.
I use mediation to enter alter state when Body and mind are in union. Then I shift awareness to my focuses which could be ritual, visualization, fantasy and astral projection, as well Union with higher power.