[burgerbrain]

"I guess you would hold that humans make [wheat] flour?"

Yes, that generally is held to be the job of millers...

[ars]

I reworded it to say comes from humans.

Which actually clears things up:

  Honey comes from flowers.
  Honey is made by bees.

  Flour is made by millers.
  Flour comes from wheat.

Seems reasonable to me.