Still not as dumb as what Hagoromo did. Sasuke literally tells him what he wants to do and Hagoromo just gives him the power to do it.
For example let's say I have two sons, and I ask one of them what he wants and he tells him he wants to protect people and I give him something to do so. Then I ask my other son and he says "I want to kill my brother" and I in my great wisdom say "Sure that's sounds like a great idea. Here, here's a gun to fulfill your wish."
No wonder the Naruto universe is so screwed up. The adults in it are idiots. It's an endless cycle of stupid people.
What's worse about it too with Sasuke is he claimed it was for a good purpose what he wanted, but that's a load of crap, since he just was only thinking about HIMSELF like he usually did. It was to just to also spite everything Itachi did for him, even when he knew the truth of his brother's actions.
And agreed with the adults. And they also helped shape some of the ways the kids end up acting, like how Naruto is as Hokage for one thing, or Shikamaru trying to more or less replace Asuma due to the guilt he felt over his death when it wasn't his fault, and even if he knew what Hidan COULD do, it doesn't mean things would have changed...
it's why I kinda wished the series had done different ways for the rookies to become better than their past selves. The only one who wouldn't have really is Sasuke, since all he ever cared about was himself.