I use Twitter this way, to some extent. I consciously try to follow people with different perspectives than me and with opinions counter to my own. Sometimes I end up unfollowing those people if the signal:noise ratio is too high, but over time it serves as a way of introducing me to new ideas and ways of looking at things that I hadn't considered before. And, because of retweets, I'm then introduced to more people with similar perspectives. Once you "seed" your timeline with a few people with different perspectives/opinions than your own, this works really well.
All that to say you can use at least Twitter to intentionally break out of that intellectual isolation that can otherwise be difficult to escape.
All that to say you can use at least Twitter to intentionally break out of that intellectual isolation that can otherwise be difficult to escape.