It's the bloody future. They make it comfortable.
A flat chest piece can grant the same comfortability while increasing chest protection whereas a non-flat chest piece decreases protection. It remains a design choice without any semblence of practicality and outright introduces impracticalities such as the aforementioned decrease in chest protection. This is especially given that padding to decrease uncomfortability in men and women when wearing armor actually more or less neutralizes a person's shape thus there should be no need for breast bulges especially of that size and that visible. It's like nipples on a breastplate except this design choice legitimately endangers the person it is suppose to be protecting.
In the article I previously sourced, a commentator brought up that it seems a design choice that is intended towards portraying that women are an established and common part of the military. The problem is that the design choice actually undercuts this portrayal because the armor does not seem designed with practicality in mind which it should have been had.
Additionally, I should note that I actually think it can make the armor appear to look more like ceremonial armor which places an emphasis on aesthetical value rather than practical value. This is, of course, barring cases where titillation is the intent behind the design choice.
Also, breasts are very squishy things as explained in this quote;
"As if that wasn’t enough, twin-bulged breastplates ignore the anatomical makeup of the female breast itself. To make a long story short, the breast largely consists of fat and modified sweat glands (for the production of milk, that is), and hence it’s not nearly as solid as a comparable mass of muscle. So all but the largest breasts can be bound quite flat against the woman’s chest without occasioning too much discomfort. In turn, this means a fighting woman probably isn’t going to need a breastplate with a chest profile larger than one worn by a fighting man of a similar height and general body shape, and therefore it’s quite likely that the woman would simply fit into the man’s breastplate with the aid of some padding to make up the slack in the waist and shoulders."
This is not to say that people, regardless of gender, cannot like the asethetic of the armor but it is to say that it remains a design choice that has no sense behind it from a logical, functional or practical perspective as far as I can tell.
Source: http://l-clausewitz....com/384382.html