Oh, yeah, it does suck that those are considered to be things that make someone 'better', but I've seen too many people bash Rose for being a 'chav' and 'stupid' (because, of course, lack of education and lack of intelligence are the same thing. *rolls eyes*) not to know that it matters a hell of a lot to some people. For some, Martha training to be a doctor and never living in an estate does make her a better person than Rose.