She is just not getting into handgun that much to justify the purchase. Although I agree that this particular gun would be ideal for her. I have the M&P Pro40 and it is my IDPA gun. Although I am very competitive (at most anything), I use IDPA for training more than for competition. I guess I am competing with myself while I am shooting....always trying to improve my skills. I frequently bring the PM40 to shoot IDPA, because this is what I carry. My scores drop from my scores with the M&P Pro, but that stands to reason. However, my skills with the PM continue to improve because I learn from the M&P and practice those learned skills with the PM. I would not say that the M&P is any more enjoyable, unless focusing on the scores. To me the scores are only a barometer and I don't take them all that seriously. Besides, we all have good and bad days anyway, so scores are only there as a measure.
BTW, I am noticing more BG's appearing at the IDPA shoots for the same reason. Folks are wanting more practice with their smaller carry guns. IDPA allows this kind of transition, is great training and lots of fun.