I fail to see how it's anything other than a logical consequence -- much less radical.
I know from first-hand experience that if a team don't believe they have a particular person as their manager, that person is, in fact, not their manager. It's impossible for that person to be their manager.
I also know from first-hand experience that once a group of people no longer believe themselves to be a soccer team, they stop being a soccer team. (Well, actually, this is not about a soccer team but the real example is too fresh and personal to be detailed about so let's pretend it's about a soccer team.)
Similarly, I know from second hand experience that once people don't believe a person is part of a family, that person is, in effect, not part of that family anymore.
I have third hand experience of people not believing a grocery store to be such, and indeed it ceased to be such very quickly and tragically to its former owner.
And so on. I can't think of any social construct that does not require buy-in from the affected parties.