Because sexualisation of women is the raison d'etre of this game.
The argument most people against sexualisation in games make isn't that sexualisation is always wrong, it's that 'If not for the oppressive / needless sexualisation of characters in this game, other groups could/would enjoy it.' That argument does not apply here, as without the sexualisation there is clearly no game. It would be like asking for a porno to cut out the sex so prudes could enjoy it. There'd be nothing left.
That´s a hypocritical distinction.