I had a think about this.
The fact that there is so much else to do makes the sex more relevant. You are, after all, invested emotionally with your crew, because of the time you spend with them... in the real world. There is another game, almost too difficult to get one's head around, called Masters of Raana. The creator has a similar approach - and you really have to pay attention, think before clicking, before you get to the goodies. Then you have to work even harder to manage all the components to keep the goodies coming!.
I'm older than many gamers (64, thanks for asking!) and grew up reading hard books, playing chess and tabletop wargaming. I find too many games refuse to let us access our frontal lobes!