i agree completely especially because for work your chest is often covered and so stylewise it makes turtlenecks and things look weird and it's difficult to find button down shirts that will accomodate your chest and not be huge in the waist though i'm sure she must have all her's altered.
Being Ivanka Trump, having all her button down shirts custom made probably isn't an issue...
In a way I understand her getting the augmentation. She isn't really going for a high-fashion, flatchested runway model kind of look, but more of a classic, sexy look. A bigger chest works with that. Also, as the jeans picture shows us she has some hips, so I guess the girl wants to be an hour-glass, rather than a pear.