Yes it is. That's why we don't go by hearsay, but look for as much objective evidence as possible. Subjectivity is simply not very reliable. Two people can watch one and the same movie in the same circumstances and one may find it true and wonderful and the other false and horrible.
This is actually possible, I grant you, dear kosta. But how often, really, does such a situation actually occur?
Most human beings can identify with the experience of other human beings. All are existentially in the "same boat," so to speak.
Which is to say there is a commonality in human experience such that people in movie theaters tend to identify the same things in the film projected to them. Indeed, if they didn't, that is if this were not a reliable expectation, then producers, directors, and actors wouldn't know what to do next.