Paradoxically, even as the daunting array of information sources grows, we seek comfort by consuming narrow views that support our own interests and biases.

we are all becoming a minority...

But it's the nature of emergence to do so, and it's OK. As a city forms, its bakers move into one section, its carpenters move near the lumber suppliers, etc. And the result is a fully-functioning city with many subgroups. You might enjoy Stephen Johnson's wonderful book Emergence: The Connected lives of Ants, Brains, Cities, and Software.

Not that I disagree about the need to be moving into new communities and listening to better ideas!