It's not clear to me that living in a personal bubble should be seen as derogatory. Since there's more media than any of us can consume, and none of us surf randomly over all of it, we all live in such a bubble. To acknowledge that is a start on improving its quality. For instance we can steel-man our bubbles by consciously including the highest quality perspectives from the tribes we oppose.

We can think of that in terms of know-your-enemy, but often the effect of hearing from the best of those enemies is to find the ways in which they are either allies, or at least to learn to empathize with their positions. If we had no bubble, and just took in the loudest most amplified opinions at random, we'd be more likely to inaccurately conclude that those positions had no steel-man positions to learn from. So a well curated bubble is better than the illusion of none at all.