Why Caren Kaye?

Senator Blutarsky's answer is perfectly appropriate for any "why?" question even if further explanation as to why it was asked is added, as the further explanation is only opinion. Since you asked why, I answered. Instead of asking why, you could have simply said stated you believe she was wrong for the role and given your reasons why. But you did ask why..

But let's look at your reasons as long as we're here. This is all subjective stuff I realize, but I don't think she was skinny at all, and as far as her "saggy" breasts, those of us who know what real breasts look and more importantly feel like know that her breasts were very nice and indeed greatly prefer them - nothing at all like those horrid hard implants that women unfortunately attack their bodies with to please the small (but very vocal) minority who prefer the hard misshapen implants that is what they see in pornos.

https://celebjihad.com/celeb-jihad/images/caren_kaye_nude_my_tutor.jpg