Art, I don't understand why any points you make always seem to trump everyone else's. You asked for reasons as to why people like this & they gave you reasons. Those reasons seem to be good enough for some, but they'll never be good enough to shake your preconceived opinions about this poster. So in the end (if this IS the end), all you've proven is MY point: You either like it or you don't...for your own individual reasons.
Great discussion. Pick another poster & let's do it again. There's not much more to say about this one without picking the meat off its bones.
I think we would all learn more from this discussion if someone would stop saying "Let's have a discussion" during it.
I like this poster because of reasons that have nothing to do with whether or not it sold a single ticket:
* It's clever conceptually, and does so with a short, 1-color punch line using a familiar image.
* It's interesting compositionally & makes decent use of neg space.
* I like the color choices.
* It appears to fit the band, or at least the band name.
With this particular poster, I don't feel compelled to dig any deeper than that. I'm off to discuss another one now.
The discussion of this or any other poster is stimulating, healthy for poster art in general, and may in fact turn out to be educational. After everyone discusses it to death, the conclusion might still be that you either like it or you don't. That doesn't mean poster art is "low".
There's a lot of wonderful spontaneity, & (thankfully) it's not always so cerebral. Sometimes it is, sometimes it isn't. Some jokes are simply one-liners.