The case that I know is not extreme. The girl was probably never away from home for more than a shabbos or school shabbaton weekend. That is the type to be worried about. It is not extreme, just abnormal that someone in today’s world should be in such a situation. But now the divorce is tearing the families apart… the girl could just not handle being away from home.
If the guy/girl went to college and lived independently from their folks, that would be the same (or even better) than seminary. But if someone wont be going to seminary out of the area they are most likely not going to be going to a university out of the area.
I never said that if someone is homesick in sem they will be when they are married. I just said that if they never went away for 9 months, how likely is it that they will be able to live out of state from their parents? Yom tov not with their parents and siblings? The first time was a biggy for me and many of my friends. But the next time they were away they were able to deal with it and were not crying from homesickness. First times are always hard. Let them get their first time when they are not going to endanger their marriage when they will be going to his side instead of hers.
Going out of state/to montreal will do the same thing, especially if they will not be going home for every shabbos, yom tov ect.