I don't think it's contrary at all, but rather complementary. The quoted lines don't say that all of society becomes one, it says larger groups of people are exposed to the same information and thus makes their behavior similar. These groups of people are the bubbles and echo chambers that become blocs of people with similar behavior and ideas. You yourself show how the two ides work together:
>we may have access to the same information flows but everyone has their own bubble, typically part of an ideological camp.
>we may have access to the same information flows but everyone has their own bubble, typically part of an ideological camp.