Raised beds allow plants to be placed at eye level for better viewing of pest problems. When the bed is included in the structure, you can better really get in there and work on the bed without compromising the overall shape.
I also prefer not having to bend over to maintain the bed. Just a little added convenience makes working the garden easier, even on those days when I might want to relax with a cold drink. Trust me; I have days like this too.
Where do you live have hard soil, heavy clay (like my red Atlanta clay), fine grained sand, or is your home surrounded by concrete? Perhaps, you've had a soil test done and found lead or other contaminants in your native soil?
Elevating the garden surface will keep your plants above problem soil and prevent exposure of plant roots to these pollutants. With the use of loft beds, there really are no surface issues that will stop you from gardening.
When your soil bed is higher than the surrounding terrain, you can control its health and drainage. So, anyone, anywhere can grow a productive raised bed garden, no matter how bad the ground you start with.
Frankly, I also like the look of the loft bed. I have found their aesthetic value to be of great benefit to my possessions. Given these options, I can't imagine gardening without raised beds.
