Do I need to mill flaked wheat, maize, or rice?
Nope, just add it to the mash.
No, the flaking process spreads out the grains well enough.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk