What the rabbi means is that the quality of men's lives would be effected. By not educating women they can be held in slave like condition giving men the position of masters of slaves. Women contribute to all areas of the worlds knowledge. a women's place is where she is comfortable not necessarily in the home not just being fruitful and multiplying.
IDF reservist, 44, dies of heart attack during training (Haaretz)
from the article: Leading Israeli religious Zionist rabbi: A woman's place is in the home