Let's talk about Fu's plan

He felt a negative aura from Nooroo, so, instead of contacting already known heroes (the United Heroez), he decided to make his own. That's fine, but then he goes and gives Miraculouses to two random strangers who he doesn't know will use them properly, or if they'll be any good at it. Even worse, he gives them to two teens who KNOWS will have limited use their powers until they become adults, as well as limited use of their brains because they're CHILDREN. And ON TOP of that, he gives out the TWO MOST POWERFUL Miraculouses, that, if captured, have the power to destroy THE ENTIRE WORLD. And he does ALL of that BEFORE a supervillain even shows up. And you might say: "We need Ladybug and Cat Noir's powers," but you're wrong. We don't Cat Noir, seasons 4 & 5 proved that well enough on their own. As for Ladybug, what do we need her for? To purify the akuma? You're telling me that of all the Miraculouses, only ONE has the power to counteract the Butterfly? What about the Rooster; couldn't it just adopt the power to purify the akumas? Sure, it can't copy any other Miraculous' power which is bull in its own right, but Ladybug's power is CREATION, not purification. What about killing or trapping the akuma? Wouldn't that work? Okay but surely we need Ladybug's restoration powers, right? Absolutely not. Good superheroes don't need those crutches, because they don't allow the villains to wreck mass havoc or KILL people in the first place! The fact that they do need this power and in fact rely on it so often shows how terrible of a choice Fu made. As much as I love this series, there is no reason for ANY of this to happen. Logically, the plot should've ended before it evan began!