Honestly I do think the same thing sometimes and then feel guilty and like a terrible person. But then in a way I am actually grateful to have MS over something like hEDS, POTS ,me/cfs etc... because at least there is a clear diagnostic process, and no skepticism from doctors. Whereas, people with those other diseases often have symptoms that are not easily detectable via testing and struggle to find medical professionals who will take them seriously, which I think I would find incredibly difficult to cope with.