Imagine the products of a culture with less tolerance for untruth than our own. It might see more films with postscript reality checks, like Jackie Chan's making-of "if you do this, you will get hurt". More children's picture books with errata pages, like Penny Chisholm's. I wonder if some such might be encouraged somehow?
"Want" or "is good" are two different things. We're living in a culture where a lot of people clearly love believing all sorts of untruths, and don't care much for the real truth. Is that good? I think not.
Of course movies are for the most part relatively harmless entertainment, but they too do shape expectations. I've heard of Juries rejecting reasonable evidence because crime shows have taught them to expect iron clad proof.
You can not watch the movies you know. Nobody forced you to.
Movies are just fairy tales and people enjoy fairy tales for good reason. Stories are actually a very efficient way to sharing information. I could why in detail but I’d just say it’s the way we process information is more emotional than logical. A fairy tale is essentially a hyper compressed emotional truth (when it is a GOOD fairy tale).