In normal games, graphics don't matter that much to me, but this is a porn game so you have to actually get turned on by it. Whether you do it with pictures, good writing, animations or a combination is a matter of preference, but you still need to do it well. Otherwise you lose the whole purpose of why many are playing. Of course, if the game is marketed solely as a stationbuilder/conquor-the-galaxy and the porn aspect is seen as an add-on - like the mods you get for skyrim - it's a different matter. The result might be exactly the same, but people's expectations are different.
Secondly, if you let me make choices, I'm going to identify more with the character. This makes it much worse when choices are then made against my will. Never half-ass freedom of choice.