Dating longer is beneficial to avoiding divorce? Yeah can we surely need to learn something from the non-frum, secular society. Ahem. Sure, just look at the low divorce rates in the non-Jewish world. They are not changing spouses like hats, are they? That’s because they not only date for a very long time, but they also live together before marriage. Can you get to know a person better than that? Clearly the sholom bayis in the secular world is one we can learn from.
What exactly will you see when you date for longer? No human walking the face of this earth does not posess negative character traits. Which future spouse’s moral failings which you’ll definitely see more of the longer you date, can you live with? And people that seem nice on dates are not necassarily so. Just because a buchor is courteous to a waiter and says thank you is no indication that he will change the dirty daiper of your two year while your feeding your newborn.