I liked your points! It's true that if the reader feels related to the story or the moment itself, they'll like it and even leave a comment
Not only comic artists should know their public, but also expect that most of the readers are still students, which I believe that's why most popular comics genres are romance, school, and slice of life, because the readers feel more attracted to these comics
I'm not sure if I'm crazy of something, but I also feel that many movies include some romance in it, even though is not the main focus of the story, it's just because it's popular and people like to watch