Being something of a perspectivalist, I would tend to agree with the statement if it were not universalised, and extend it even further.
At one time, a young person would spend a year or so--- often accompanied by a tutor--- on an European Tour; to see something of the world by traveling and meeting people of other nations was seen as time well-spent. Currently, many universities have programmes allowing their students to study abroad, and there are exchange students in high school.
Earlier in time, students were encouraged, for the same reason, to have "pen pals" from different nations. The arrival of the internet, with the possibility of making acquaintences and friends (sometimes even lovers) from all over the world, through forums and chat engines supports and extends to everyone this opportunity.
The extension I mentioned includes not only the spacial dimension, but the temporal as well. The study of history expands one's perspective in two ways: one sees the world through different eyes from the past (for example, the Hellenistic world is akin to a foreign land), and gains an appreciation and understanding of how one's situation (the always-already in Heidegger's phrase) has come to be as it is.
The extension also includes a knowledge of great literature, for this also provides different perspectives on the world that one might not have without it. Literature creates unique worlds and can alter our conception of our own and how we can comport ourselves.
Finally, this extension includes the study of philosophy. Every important philosopher presents a different way of understanding and interpreting the world in which we live and our place in it; it liberates us from the common way of thinking by showing us different directions and providing analytical tools we would not have ordinarily.