Yeah, not so much. its simple math and you are all twisting things and making things up to "prove" your points.
Since whether you get a drop or not is random, no matter what type of monster you kill (R, O, W, and G ), then by killing more mobs in a shorter amount of time
you have more opporunities to randomly get a drop. How can you not see that?
Here this should make it simple for you. If 50 NFL players and 50 girl scouts came up to you and said "one by one, you can fight us all, and if/when you beat one of us up, no matter who it is you have an equal chance of getting some money out of us. Who would you fight?". Anyone who says the NFL player if retarded and just arguing to argue.
Yes, there are exceptions. Maybe you have amazing gear and CAN kill Red and Orange mobs just as fast you kill Whites and Greens, well by all means, STFU and just go do it. But for us none gold buyers (

) we have to remember about money for pots. So killing mobs lower levels than us makes more sense if we are trying to make money by getting more drops.
Please tell me you understand that.