The weight of it can pulverize your soul. There is a forum to teach, to effect change, and to make a difference. There is also a chance to prove that you are as smart, as tough, and as good as, maybe even better than, the other guy. And, despite what most workers think, when you are the boss you are not free of control. You still have a boss yourself.
Every boss answers to some other boss.
Perhaps it is stockholders, or a board of directors, or a bank, or customers. The harshest boss of a boss is ultimate accountability. Most workers strive to be a boss. Soon afterward you are expected to make those other people do very good work. The theory is that if you do a good job at one level, worker for instance, that the next level, supervisor or manager, is a logical progression.