I don't gave anything against Sly Flourish BTW... He seems eminently likeable and broadly unobjectionable, like Alan Titchmarsh in a wizard's hat.
I snipe at this class of person a lot but the reality is that I don't think they know any more or less about RPGs than any of the hundreds of middle-aged dads who go to cons and clog up the pipes on Reddit.
I guess what I am actually objecting to is the idea of expertise and social elevation. These people do not know anything more than you.