The thing about corporations is that they internally run on politics and a fixed hierarchy of command and control. No different than a resolutely "anti-capitalist" government office! You can think of this as an 'anarchist' observation if you want, but it's just a fact of life. So when we see corporate activism come up with such hamfisted ideas that we wouldn't see in less "activist" corporations, this has to tell us something about the merit of the underlying politics.
Anyway, the thing about traditional communities, in this context - the ones that "have to be a certain way" because they've been that way for generations - is that they have immense inertia; they create real social ties that can bind people together and make them resilient even in the face of very real, structural, systemic oppression. I don't see "polycules" as achieving that in the near term, even though that kind of fluid free association is undeniably the very earliest step towards what I'm thinking about.
A traditional community is not going to just dissolve when the going get tough, or when interpersonal conflicts arise (and such conflicts are inevitable in large-enough groups!): they uniquely encourage people who might otherwise dislike each other to cooperate for collective benefit. There is great value in that, which is not often acknowledged.