Your spine has to stay healthy to support your musculoskeletal system, keep you upright, and protect your central nervous system.
When your spine is properly aligned, your body is strong and mobile, with no interruptions.
When your spine isn't aligned, it can lead to the dysfunction of your central nervous system and lead to a variety of health problems.
Think of a car that has a front end out of alignment.
Sure, you can still drive the car, but not as easy as you should be able to, and driving with it out of alignment can eventually cause other problems with the car.
You will have difficulty steering, braking, and the tires will wear out quickly.
Your spine is obviously a little more complicated than a car, it will still react the same way to misalignments.
Your spine must be aligned so the rest of your body can function properly.