He might be so immersed in his own real (in - story) life that fan - made stories seem unimportant. He has gods to deal with, monsters to fight, and friends to protect. Fanfiction is something created by fans outside of his own reality, so he has no reason to care.
In some fanfictions, Percy's lack of care could be due to a change in his personality after a major event. For example, if he's been betrayed by someone close to him. He might feel that the world of demigods is not what he thought it was. So, he starts to distance himself and act as if he doesn't care about the things that used to matter to him, like protecting Camp Half - Blood or going on quests. This can add an interesting twist to the fanfiction's plot.
Maybe it's a way to atone for something. Apollo might have done something in the past that affected Percy or his friends negatively, and by taking care of Percy, he is trying to make up for it. Or perhaps there is a prophecy that involves both of them, and Apollo taking care of Percy is part of fulfilling that prophecy.
Percy has had a lot of experiences that are both amazing and terrifying. Fanfiction allows him to see how others would have liked things to go differently or how they would have added their own twists. It's also a way for him to kind of relive his adventures from an outside perspective, which can be both entertaining and thought - provoking.
Because Percy has powers from the gods. He can control water, which could be used to great effect against Voldemort. For example, he could flood areas or create water - based attacks that Voldemort may not be able to defend against easily.
Perhaps it could be a writer who is trying to make a statement about how even the strongest characters can be broken in certain situations. But this is a very uncharacteristic and disturbing idea for Percy. The Percy Jackson series is about hope and growth, and such a fanfiction would be a radical departure from that. It could also be a writer who is misinterpreting the character and the themes of the series completely. In the original, Percy is a fighter, and to write about him taking his own life in fanfiction seems like a very wrong - headed approach.
Another reason could be that Harry has a different view on creativity. He may think that only the original creators should be allowed to create stories within that universe. Fanfiction, which is created by fans, might seem to him like an infringement on the original work or just something that dilutes the purity of the original concept.
It's a very strange thought. Maybe they are just misinformed or haven't really read either series properly. There's no real similarity between the two that would lead to such a conclusion.
I can't really think of a good reason why someone would think that. Maybe they misread some aspect of the story? But as I said before, the story is all about Greek mythology and Percy's adventures as a demigod, not security.
There are a few reasons why Kronos would be interested in reading Percy Jackson fanfiction. One is that he wants to see how the demi - gods are being depicted in these fan - made stories. Since they are his foes, any new information or different portrayals of them could be valuable to him. Another reason is that the fanfiction world might show him new ways to manipulate or interact with the world of the gods and mortals. It could also be that he simply enjoys seeing the creativity of mortals when it comes to his own story and the world he knows so well.
Maybe they're just really confused. The two have almost nothing in common, but perhaps they saw some fan - made crossover art or something and got the wrong idea.