In all fairness, most people do not know that they can, and few would be willing to try even if they did know.
There is no motivation unless with are inspired and encouraged by forces beyond ourselves. Otherwise, we live and die, until something comes along and fractures our zeitgeist. Then most people die, and the few that remain either cling to the old ways, or try something new.
Many of us are essentially lazy, often fearful creatures who do little more than necessary.
However, we bore easily and thus there are a few seekers, inventors, explorers and adventurers who will boldly go where others fear to tread, either on their own or by following another's example.
Outside factors can change the nature of things and whether we look outside or inside. For example, I wonder how much has been displaced/lost by the ubiquitous television/idiot box.
It’s very easy to clear one’s mind. Meditation, self-hypnosis, and the ability to concentrate can all be learned and practiced to great effect.
It takes effort, but it can be accomplished with perseverance.