In these chaotic modern times, most people live in their head rather than their heart. Busyness, independence, accomplishment, success, and even a focus on self-improvement often take priority over people, and a direct experience of the world around us.
Also, living in your head may unconsciously be chosen because it protects you from dreaded feelings of vulnerability and fear. What if your Achilles heel was exposed or even the real you? You might be subject to rejection or even failure.