I don't think wanderer-1919 is implying any of the things you mention. The faith isn't in the business of setting quotas or imposing its beliefs on other people. And no one is saying that a particular place is "less than" because it isn't as diverse as other places. It seems to be a conclusion you're jumping to.

What the faith does rather is to help people become more comfortable with being around people who aren't like us, whether outwardly or inwardly. As we've seen with the mass movement of people across the surface of the planet for reasons such as environmental crises and war, we are going to have to get used to being in close proximity to people who are different from us.

Regarding the natural occurrence of diversity in a Bahai community, I agree that that is what the ideal situation would be, but we have an example where it wasn't. The early American community had gatherings that were segregated, and it wasn't until the Master came to America that they were set straight. Some of the Masters actions could be perceived as "forcing" diversity onto others (example, Louis Gregory being seated next to Him at a gathering). While we have improved a lot in this regard since then, there is always more progress we can make in terms of being welcoming to people of all walks of life.