Most humans have this built in tendency to focus on the easy things in life. There's a small dopamine reward given for each tiny win. So they continue to keep it up as long as they possibly can and for the most part it's enough to function and maintain a relatively normal societal lifestyle. A paycheck for example, will give you that "feel good" feeling momentarily, until you spend it all and crave that next one. Paychecks are pretty easy. You already have the job and all you have to do is show up and do the same thing you did the day before. Easy as in predictable, not as in simple. You might manage a team of 12 and work 18 hours per day. Not a simple job, but the work process is relati . . .