The effectiveness of the ME lobby reflects its middle-class base.
Like... this sounds like an incredibly English thing to say, but... What does this even mean???
I think they are trying to leverage several biases, not suprising as they are quite obvious manipulators (look at the fuss White is now making about patient "consent") It's buzz words to provoke a reaction.
First set of biases is around the ridiculous situation we have with class in the UK whereby the "working class" are valorised as heroic and "real" (when it suits) and the middle classes are to be sneered at, as somehow being above themselves. Good way to set people against each other as everyone scrambles to be a true "man of the people" and not like those awful "middle class" folk !
And then adding to this we have the stereotype of middle-class women especially, as being frivolous, neurotic and uninformed, and having nothing better to do with their time and money than sit around imagining illnesses and engaging in annoying campaigns - just like all those hysterical and do-gooder Victorian ladies and a bunch of soppy milquetoast men did.
It's an appeal to bigotry and emotional hang-ups. Same kind of tactics as the vexatious and harrasment myths they peddle.