Frankly, I don’t understand the question. It should be obvious why we would want to cultivate in our daughters a love for our homeland of Eretz Yisroel. It is a mitzvah to live in E”Y, and while it may not be practical for many of us to make aliyah, even living there temporarily for a year or two is worthwhile. Imagine the spiritual benefits one can glean from living in the midst of our nation’s history, and the tremendous value in being immersed in lashon hakodesh. Imagine being surrounded by our brothers and sisters, of whom even the most sworn secular know their Tanach. Truly, there is no place in the world like E”Y. And in large families, it’s very likely that seminary is the earliest opportunity for girls to visit E”Y at all, due to their parents’ financial circumstances.
Regarding the “exoticism”: An 18-year-old is still a child in many respects. Send her to E”Y to learn Torah and make sure she understands that that’s what her primary goal is. But let her have some fun, too. When she comes back to the States, she’ll very likely go straight into the shidduch world, and could end up juggling work and family responsibilities on a tight budget before she’s old enough to drink. If she has the opportunity to go abroad and have some adventures with her friends, let her do it now before that opportunity disappears– and so she doesn’t end up jaded, thinking Yiddishkeit is all work and no play.