How can a symptom be the "cause" of a disease? Gingivitis is "inflammation of the gums", but it's "caused" by bacteria, plaque, tarter, etc... inflammation is the description of what is happening (ie, symptom) not the "cause".
For example the "fat cell leak": The body is correctly responding to a real problem, but the response is so heavy handed it causes other problems.
Which is why suppressing inflammation might be an interesting area of research, but we wouldn't want to completely eliminate it because the body may lose a vital tool needed to fight illnesses and normal maintenance.