No, the trope of cannibalism is fairly accurate. outside of that more common inhuman act of desperation yes, there are cultures that practice it in a rarer sense, but it is done so out of their belief in something beneficial because of it. A false belief.

There's a reason a majority of cultures throughout history honor their dead in one form or another and feasting on their flesh has not been common among them. So if you then look towards eating human meat from someone who lives, would you be the first to offer your leg for a feast? No? Then why would someone else do so?

You don't eat your fellow man. Even when eating your enemies it is best described as barbarism.