Time is so precious. How you choose to spend your time, who with, doing what… none of us have an infinite amount of it, so the scarcer it becomes, the more precious to us it is. Choosing to spend time drawing is choosing to rank that thing as being important.
Whether its the time we spend drawing a flower on a birthday card, or the preliminary sketches of an oil-painting, we have decided that either the viewer or the subject or both are important to us, and we took the time.