It doesn't have to be Citizen Kane, but it would be nice if film makers could at least put the maturity level of their films on the same level of say...Star Wars. Again, not at all a mature movie, but it's enjoyable for all ages without the need to pander to idiots with sex jokes, humping dogs, or simplistic and cliched stories.
To a certain extent I do agree with you. There is really no weight to the terms "good" or "bad". It comes down to what you want out of a movie.
If you want to watch a film for the story, these films are shit. If not, there's enjoyment to be found here if you're a part of the demographic that this film has been tailored for. It's really that simple.
The argument goes back and forth. "I want a film with a story!" "What did you expect, it's Transformers, it's just for kids!" "Yeah, but I like Transformers, I'm no kid and wouldn't mind a better quality film. Kids would like it even more, too." "What would be the point? It's just giant robots. You're not supposed to get a story, you watch it for the action!"
It's all about wanting your cake and eating it, too. I don't see the problem with that.