>>32726038Well, I liked Lillie, so I'll try my best to answer your questions and explain my reasoning, if you don't mind.
First, you asked why did the plot had to revolve around this girl. What I don't understand is the problem. Why CAN'T it revolve around a girl? It's not exactly a new form of story telling. The most important thing in the story is hardly ever the protagonist. Sometimes it's a magical item, sometimes it's another mythical place, and sometimes it's a character. The protagonist just resolves the conflict. You can see this in all sorts of stories. From you One Piece to your Berserk. It's just another form of story telling, nothing more. There's only so much that can revolve around a silent character, so they added another.
Second was how a Trainer has shit to do. Yes, they do. And you do shit. You're training your Pokemon, taking on Trails and becoming the Champion. You're just also doing something else, helping a friend. You're always taking this type of detour, be to save the world or help someone retrieve a stolen Pokemon. This time, I actually cared. I didn't care about saving the PokeWorld. It's too impersonal and frankly boring. I didn't care about helping retrieve random Pokemon that Rocket, Galactic or any other team stole. But I did care about saving something I had grown attached to.
Now, I can understand why you would consider this a problem if you didn't care about Lillie. Which you have admitted to. But most of people did. Of course they would. They gave you enough time to care, and Lillie had a pleasant, charming and caring personality, all the while hinting at her role being more important, which got people to care. If you don't like those things, you wouldn't care about any of this. But that's a matter of taste. I wouldn't call that an inherently bad thing. Sharing your journey and adventure with someone was something people liked, you didn't. That's all there is to it.
Hopefully that cleared some things up for you.