Here are my thoughts for you. If we are right handed we generally do things almost automatically with our right hand or at least tend to learn things that way. Since our main basic controls for aircraft are pitch and roll, elev.(pitch) ailerons (roll) it will usually become instinctive to control them with our right hand, our brain functions that way. yes full scale aircraft are controlled pretty much in that mode. Rudder are on the pedals, throttle on lever on left side of cockpit. Why anyone considers it more logical any other way stumps me. Most times when you roll you will likely input some elevator as well so do it together with same hand and the precision that your right hand is most capable of. Once you have learned to f ly reasonably well these control actions become automatic, no time for thinking. Learn with mode 2 you will be glad you did.