...yes, the manager is part of the band's company, he is literally emplyed by the band, he has input, he has influence, he is a part of the "team". A fan is just a fan - but certainly not a part of the team.
And what about it when Finland wins in hockey, are you part of the official representation team? If so, yeah, it is okay. If not, then no, your national team won, and you cheered for them, all good, but you and them can't be described as "we" like you're talking about it