In order to experience an ethnically-diverse group as more homogenous than an experientially-diverse group, one must interact with them on a dismissively superficial level. That would be the lens of "making nice with white people." Great thing about white people? They don't have to make nice with each other! That means they never have to navigate around all the racial bullshit that has become a dull hum in the background of their lives. It's almost like when you're hanging out with a bunch of white people you don't have to worry about someone taking jokes the wrong way so you can just let your white flag fly!In the latter location, we're exposed to a broader range of opinions and experiences, but they feel less diverse (to her) because they're all processed through a similar lens.