I like the futon for several reasons.

• When you aren't sleeping, it folds neatly and you can tuck it in your closet, making the room more spacious and easier to clean.
• You can move it easily to give it sunlight so the UV will kill bacteria, allowing you to wash it less frequently.
• If you have tatami flooring it's very comfortable, the smell is wonderful, and it helps you sleep better (sadly hard to get outside of Asia).
• If you move during your sleep, there is zero chance you will fall off the bed and hit your face.
• When comparing it to a western bed with a frame, it is cheaper than even the crappiest IKEA bedframe that will squeak with every movement and break when having too much fun with your partner.