It is important for everyone to have a healthy diet if they want to enjoy their life for longer. But for people with a disability it is even more important. In fact, you could say it is an essential part of their care and should be something that is a normal part of their lifestyle. Why? Disabled people usually have many more health problems than others.
If they have a diet filled with fast food or high sugar snacks they are even more likely than others to succumb to diseases such as diabetes and other problems. A poor diet will make them even more likely to become obese because they cannot move around and exercise to the same extent as other people, especially if they are wheelchair bound.