I teach high school, and I feel like I see pretty direct effects of the filter bubble. My students who are inside the bubble and unaware of that fact are more closed minded, racist, sexist, and hostile toward individuals and groups with views different than their own. Students who get their "news" from a variety of perspectives (through more consistent academic engagement, for example) are more open minded and tolerant.

Breaking out of the bubble is not about "forcing them to see everything else". It's about curating a variety of perspectives, rather than curating a slice of similar perspectives.