Does meditation make you less motivated? Does the contentment take away your drive? In a way it does. But in a good way. Motivation can be broken into two kinds: sufficiency motivation and deficiency motivation.
Sufficiency motivation is contented, satisfied motivation. Do you do what you do because it feels good? Or because you really want something good to happen? Or to make something beautiful?
Deficiency motivation is agitated, needy motivation. Are you working and striving out of agitation? Out of the effort to prove something to someone? Out of greed?
Meditation diminishes deficiency motivations and increases sufficiency motivations.
Meditation makes your motivations healthier. You'll be motivated by those things that will actually make you happier. Meditation makes your motivations the kind that bring about a saner and happier world.
Read more: The Physical and Psychological Benefits of Mantra Meditation.