Ultimately, does any form of music have to 'say' anything? Giving pleasure/provoking an emotional response should be enough. Rock used to have 'something to say' when it was new, brash and anti-establishment, but the passing of time has made it part of our culture and, therefore, makes it more difficult for it to shock or be confrontational (but not impossible). There's plenty of new stuff out there and my gauge is whether I like it musically, not whether it has 'something to say'. YMMV.