Yeah, that's it exactly. Films aren't reality, although they can be a reflection of what we might think how reality should go. Af the end of the day, films are made to capture an audience, not to paint a perfect portrait of the real world.

Also, there are counterexamples to that person's claim, such as the film Before Sunrise, which is an excellent romance film that doesn't involve an arc where the characters are indifferent or dislike each other at first. The films Sideways and even Office Space defy that trope as well.