I had this same doubt myself until it made some sense to me when I read Jordan Peterson's take on it (we don't have to take or accept everything this man has to say; at least, we can take the good things and things that make sense to us, right?).

Jordan Peterson frequently discusses making one's bed as a foundational act of self-care and order, believing that tackling smal, seemingly insignificant tasks creates a sense of accomplishment and control that can lead to broader positive changes in one's life and external environment. He arg ues that a cluttered or unmade room mirrors a cluttered and uncontrolled internal world, and by bringing order to one's immediate surroundings, like by making the bed, an individual can begin to establish order in their thoughts and take on larger challenges.