They're appealing because it shows a different side of Ron. Often in the original books, Harry is the hero. But in these fanfics, Ron gets to be the savior, which is a fresh take on their relationship. It gives Ron more agency and depth.
There's also a fanfic where Ron saves Harry during a Quidditch match gone wrong. Harry's broom is jinxed, and Ron, with his knowledge of broom mechanics and some quick spell - casting, manages to break the jinx and catch Harry before he falls. It shows Ron's loyalty and his ability to act under pressure.
One common theme is friendship. Harry's act of saving Hermione emphasizes his loyalty and deep friendship towards her. It shows that he values her more than just a fellow Gryffindor or classmate.
In the fanfic, perhaps there was some deep - seated jealousy in Ron. He might have felt overshadowed by Hermione's intelligence and Harry's fame for a long time, and it all just boiled over in this really wrong way.
Well, he could use his magic skills. Maybe he casts a powerful spell on Ron to stop him and then takes Hermione to a safe place, like Hogwarts where there are protective enchantments.
Well, perhaps Snape could use his authority as a teacher. He might see Ron being too pushy or possessive towards Harry in a romantic sense and intervene by giving Ron extra assignments or detentions to keep him away from Harry.
Maybe Harry uses his magic skills to immobilize Ron. He could cast a spell like 'Petrificus Totalus' on Ron right when he's about to attack Hermione, thus stopping the beating.
There could be far - reaching consequences. For one, it might lead to a re - evaluation of relationships all around. Hermione might be caught in the middle, trying to understand Draco's motives and also keep the peace between Ron and Harry. In the wizarding community at large, the news could spread and cause different reactions. Some might praise Draco for his unexpected act of kindness, while others might be suspicious of his intentions. And for Harry and Ron's friendship, it could either be mended in a new way if they can get over this situation, or it could be permanently damaged, depending on how they handle the aftermath of Draco's interference.
Well, in some fanfictions, Draco might save Harry from a Ron romance situation because he has his own reasons. Maybe he realizes that Harry is in an uncomfortable position with Ron's new - found romantic interest and decides to step in out of a sense of fairness or a new - found respect for Harry. It could also be that Draco has some ulterior motives, like he wants to use this opportunity to get closer to Harry for his own gain, perhaps in the power struggle within the wizarding world.
There's also 'Harry's Intervention' which delves deep into the friendship dynamics. In this fanfic, Ron's actions start to border on the unacceptable, and Harry has to be the hero to save Hermione from a rather difficult situation with Ron. It's really interesting how the author builds up the tension and then resolves it through Harry's actions.