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Sexuality is an inherently human trait. Treating it as taboo causes social issues and doesn't seem to actually have a benefit on society.
It is only a virtual representation of a person, in an idealized universe. Therefore, developers have the right to extrapolate reality as much as they want.
Nothing should be considered out of bounds in an artistic work.
Whether they should do it is more interesting than whether they should be free to do it.
"Sex sells" and it's a transparent way to draw attention and alienate a portion of would-be audience.
It's trivially true that game developers are free to do whatever they choose in many countries, but whether or not they can represent all women as large-breasted bimbos is an entirely separate question from whether or not they should do so.
The journalists and critics are also free to criticize this practice, and point out what's wrong with it.
This falls under free speech and should be protected by the constitution.