I don’t know about you, but when I hear “oligarchs”, I always get a nebulous image of faceless, rich and powerful crowd who are into sex cults like Eyes Wide Shut. I kid about the last bit but I am serious about the other descriptors

I think the reason we don’t immediately think of oligarch when we see Zuckerberg, Gates or Musk is because we see them on individual basis. Whereas “oligarch” usually refers to a faceless collective of politically influential, rich folks.