The problem with filter bubbles is more about disagreement getting filtered out, not topics being filtered out. We're forced to filter very aggressively for topics anyway, just because there are too many topics and if we didn't filter close to 100% of the uninteresting topics we'd never have time for the interesting ones.

In other words, "X is potentially valuable and important" can be applied to EA, but it can also be applied to a random guy blogging about how much it sucks that his garage band broke up, as well as a near-infinite amount of other topics.