At least Okuyasu thinks Wrathion is an adult, even if he doesn't really deserve the title.

He considers it a moment. He's experienced with Titan technology, if not so much strange goblin and gnome gadgets. Surely that might translate?

"Perhaps you might find an engineer among our companions who could assist us."

Since it seems for now Wrathion has been voted to lead this venture, and it is now an us situation, but is he going to go running around looking for this engineer? Not at all, not if he can make someone else do it.