That would technically make sense with what we know about the Aliens biology traits. The Alien takes the trait of the host it comes out of. The black goo also creates something a lot like whatever it takes over like the Hammerpede or Humans from Engineers, or Fifield zombie??? Oh wait the Fifield zombie was a plot hole silly me.
So if the black goo took over a fungus then it too would have the traits of a fungus, and it's ability to send off spores. We already know that's how the one guy gets infected. So I can get behind this idea.