Definitely. Talk to anyone who's quite seriously into record collecting, and they'll talk not just about artists, but about record labels, Warp, Takoma, Deutsche Grammophon.
As well as that, consider the role of critics, of Pitchfork, Lester Bangs, George Bernard Shaw. People listen to their opinions and base their interests on their recommendations.
A curator I'd imagine would be a sort of amalgam of those two roles: not only a passive presenter of new artists like a record label, not only an active trendsetter like a critic, but both at once. Promoting and critiquing the music they come into contact with.