I read somewhere that, based upon autopsies, for every four people diagnosed with MS, there's a fifth person who never knows he/she has it. Asymptomatic his/her entire life. Then there are others of us who fill out the rest of the spectrum.
The disease is as variant as the individuals who have it. In fact, some believe it isn't ONE disease, but a syndrome, or a series of different diseases that present with similar symptoms. The list goes on and on.
Everyone does seem to agree on one thing, though. That obligatory "no one knows what causes MS" statement you find at the beginning of every article on the subject. And I'm sure, most of us would agree, we're pretty tired of hearing that particular refrain. (Someone, please know already!
So until we do know, until we can really solve this frustrating riddle, there will be wide variations in belief, approach, attitude and information.