There is no way out.
Forget about all the blunders we’ve already discussed. Even if Rose and Jack had met on the Titanic, what were their prospects of surviving? They had to risk their lives in order to flee the third class floor and pass through multiple locked gates. We know that most people couldn’t accomplish it, and as much as it pains us to say it, Rose and Jack didn’t stand a chance in hell of getting to the upper deck.