Technically true, though are many ways around this. Other priority moves, sand or hail being up to finish the job or just switching in something to tank the quick attack. Also, if that rattata eats a stealth rock or any variety of spikes, you're toast.
I feel like they're trying to hard to make people to like the Unova games more.I liked them but it felt like the ending kind of just dropped off a cliff. They reference Unova a lot in the past two games.