The process of making your bed confers several hygiene benefits.
For starters, we release a ton of water when we sleep, both through sweat and exhalation. A made bed dries more efficiently
Making the bed also has the effect of shaking loose skin and hair that came off us throughout the night, and casting it to the floor. This is especially true if you use the objectively correct technique of grabbing the corners and flipping your bedding up into the air so that it settles down into place like a parachute
Takes five seconds, looks nice as you noted, and has many other mental and social benefits we haven’t even touched on. For one of many examples, if I go to a guy’s place, I’m not gonna be inclined to get into his bed if he “won” the bed-making argument with his parents and stuck with that philosophy ever since
Edit: Tyler thinks you’re too stupid to actually read his linked study. The fact that he needs to lie about something so easy to verify tells you everything you need to know about his alternative theories about reality