I feel that the main issue is the money. Seminaries cost as much as a car these days and people are put into serious debt to make sure their daughter has “the best” because chas v’shalom what would the shadchan say? Not only that, it’s starting to make a rift between those who can afford 45k for each one of their daughters and those who simply cannot.
Instead of doing away with seminaries, we should encourage graduating girls to attend local seminaries, and short summer or Yom Tov programs in Eretz Yisroel for the “Israel experience”.