Why would you think it an insult?

Personally I don't like it. But if they wish to draw reference to the old '70's Sandman then that's perfectly acceptable.
They just want to draw you into a time, place and feel. To plant a seed of thought in your head about the good times that could be had etc.

Some people want that feeling with something made this century. It's no biggy, don't like it - don't buy it or buy into it.