Commitment is defined by merriam-webster.com as the state or an instance of being obligated or emotionally impelled. Impelled or driven forward by our obligations or emotions.
So much of what we do is by chance. We dance forward with an idea or a relationship or a task. If at some point it no longer serves the need or desire that originally attracted us, we leave and move on to the next attraction.
When I was younger, we referred to this as having the attention span of a mosquito. Recently, I've discovered that mosquitoes have significant attention spans because all their entire focus is on food. That's commitment in mosquito-land.
Only human beings can choose whether to commit or not. Only human beings can choose their focus, their commitments. Only human beings can be wishy-washy, bored or apathetic. Or afraid to commit, to make a stand, to choose.