It's fiction. Fiction.
Presidents have been murdered while in office. Does that mean that we can't ever portray a President as corrupt in fictional stories? That's nonsense.
If the film is saying that all flight attendants are corrupt, or are murderers, then you would have a point. But to never allow a member of a new "protected class" to be portrayed as anything less than virtuous? That's just silly.
All art is propaganda.
We have an obligation to call B. S. when we see it.