Even so, the oxygen you are taking in is supporting your life. What you breathe is important. Breathing is to bring oxygen into your body. Breathing the wrong things can be fatal. Breathing is the only means of getting oxygen into your body.
Oxygen sustains life.
We are made for more than breathing. Unless we breathe, nothing else matters much. When we breath, all sorts of opportunities are available. For the most part you have to breathe for yourself.