Diverse living conditions help equalize access to opportunity. The suburban schools being richer and having better teachers doesn't matter as much if those benefits aren't going almost exclusively to certain demographics, for instance.
The same applies to access to voting booths[1][2], access to healthy grocery stores[3], and so much more.
[1]: https://civilrights.org/democracy-diverted/
[2]: https://www.npr.org/2020/10/17/924527679/why-do-nonwhite-geo...