Thats because engaging with a movie, your emotional body (which is a frequency bandwidith of your energetic electromagnetic bubble) engages cymatically with the movie frequency sets and tonality. As we slowly as a people get disillusioned as to the legitimacy of spending so much money on a movie, we also get disillusioned about the content of it and the associated emotional responses.
Not that I think its wrong to try to inspire people, sometimes, but the frequency of multi-million movies alltogether participates to us feeling "used". I also ask myself questions if I reach this feeling through a movie, sometimes even to be sure I will watch an extreemly bad movie and realise how bent on exitement they all are, very shallow in a way compared to what could have been if the producer had not been "molded comercially". If you haven't seen the "watchmen" yet, then perhaps seeing this movie would clear up some things, but I don't really recommend it because it is very graphically violent ; but I admit that after seeing it I tought to myself : "they allowed that to actually pass on the screens, and not only that, it's freakin 13 years old ONLY, I would have put this movie 18+ with a severe warning"
Heart coherence, no matter what the source of the emotion, be it meditation or strong feeling of love and appreciation will create harmonic mineral cascades in the body which will trigger hormonal centers, the most powerful of which is endorphin ; if your body is not in an addicted hormonal frame then you will enjoy bliss as a continuous stream, without mixing the response with orgasm (when it seems to be better than orgasm its because glutamate-dopamine-adrenalin are involved) the bliss I am talking about is a slightly warm feeling in the spine and a cool feeling in the head.
Thats because your heart reaches a beat about every .8 seconds, which is fractal to earth base frequency of 8 hertz, the alignement will cause each blood pump to swirl with mineral ion exchange, which physically makes the bones resonate, especially all the vertebrae which each have 3 peculiar unique sounds. The frequency at which this happens is much higher than audible or visible sounds, but it will then act as an imprint on the mind because those harmonics are what creates soul and drives a human to ascend. In the shape of the heart cavity is created a kind of resonance chamber which is soul, a swirl of mineral electrolytes which auto-generate frequencies and act as a guiding force.
That is why after such experiences, sitting in the theater and being swayed by another person's emotions seems futile and ridiculous at best, of course this does not mean it can be beneficial to train to listen to others in moderation. I think the ultimate goal is to be able to listen without having to squelch the soul, finding a just balance in order to protect its capacity to spring forth.