Autonomic behaviour is characterised by self configuration and self healing capabilities, aimed at permitting the system to manage the failure of one of its agents and ensure continuous functioning.
Prevention is better than cure because there are many diseases and conditions which have no cure. There are also some chronic diseases which do not have complete cure and can cause poor quality of life due to disabilities, e.g, congestive heart failure, chronic renal failure, stroke etc.
Look up Congestive Heart Failure or Heart Failure. Left sided heart failure is the most common. It will usually result in shortness of breath. Right sided heart failure usually causes swelling primarily in the legs. There is no cure. But it can be managed with medication.
Cirrhosis cannot be reversed - it is the final stage of liver failure in which the liver is irreversibly scarred (beyond it's regenerating capacity). The "cure" is a liver transplant.
.groups of autonomic nerves operate in balance. Spinal cord injury can disrupt this balance, a condition called autonomic dysreflexia or autonomic hyperreflexia.
It is autonomic because it is involuntary
For most people, heart failure is a chronic disease with no cure. However, it can be managed and treated with medicines and changes in diet, exercise, and life-style habits.