There is other research indicating that intellectual knowledge does not translate into behavior. But direct or imagined experience does.
So for example someone who can give all the right answers on a psychology test still acts the same under pressure. But people who have had to go through and reflect on simulated experiences will have that change actual behavior.
Therefore watching and discussing relationship movies is in line with what is known to actually change behavior.
The two books that made this point most effectively to me were Enlightenment Now and Thinking Fast, Thinking Slow. The first in the context of how much the rise of fiction changed the amount of empathy that people in general had. And the second explains it in terms of how intellectual knowledge only helps with the "thinking slow" parts of our brains, but you have to affect the "thinking fast" parts to change actual behavior.