There are two sides to every story. Pros and cons for each. Try to keep it on topic "One or Two Breathers" and not that I don't understand your one dimensional train of thought.
Since you would like me to disregard all of the benefits a PCV valve or other positive crankcase ventilation systems offers I will.
One breathers in each valve cover is definitely better then one in one and none in the other for whatever it's worth. Why not do two per side for a total of four. The more the merrier.
