Obviously, they have information in them, perhaps not information that's to your taste. "Why are titles that are not to my taste allowed" is at least a question that's relatively simple to figure out.
First you complain that the title doesn’t have enough information–more information please! Then you imply there should be no titles at all–less information please! Do you see the impossible double standard?
They're saying 'what's the point of titles if they don't tell me what's inside the tin.' There's no double standard there at all. It's an impossible one (unless promoted to Mystic Master of All Titles in The Universe or At Least on HN) but there's nothing double about it.