If I may ask, are you saying that I should not change my fluid for the transmission? If I remember it correctly, there is no indication of the interval when to change it. At least, in the page summary of PMS schedule.You want to get the most out of your car in every way possible...
Follow the manual. It's why they give you one.
For those that believe that any of us on this forum and I mean ANY of us know more than Mazda, you know, the folks that built our car, you're fooling yourself.
Again if my interpretation is correct, then that means I don't have to change the fluid for its entire life.