my friend:
I was only referring to this specific aspect.
I don’t know how dating longer would affect divorce rates overall.
And yes, if we want to take it to extreme, we could say that dating forever would lead to a divorce rate of zero.
(along with a similar marriage rate.)
Or taking your position to extreme, we could say that not even meeting once would be the best. Like Yitzchok did (Eliezer did the kiddushin as a shaliach).