@Psychronia Usually the best author has already the end before like Rokujouma or Harry Potter they have in their script the short edition(3 volumes) the long one and one in case for a sudden axe (middle one).
That's why it's not a act intelligent "they are really intelligent if you look it by 3rd party point of view" the road is already half predefined either due to experience(background or mild cheat power). Like someone that know he would die later and do all to not die and usually act smart during those moment.
It's also due to the plot by arc and adding parallel timeline with more MC to give a bigger universe. More point of view of the same story used properly lead to a masterpiece or mainstream series.
So the intelligent has more knowledge (Conan or Lelouch) before the plot happen or get insight due to the author adding small hint :
like in Majutsu no Index with some minor character that become the center of problem one volume later or "we" can use "small hint" like someone portrait in a phone reveal to be the guy killed by antihero was the adoptive father of the actual damsel in distress (main center of the plot) so reader can try to predict too some event if they reread some chapter if the series is complex enough.
This one I consider it as a simple read even pokemon got a deeper meaning once kid reader are now adult and rethink about the story and all those flaw that let them make fanbook/fanart.