Ok I did not understand well but now I agree a bit more. On the other hand antropomorphism is a huge trope in SF. Aliens tend to be really human like both in physiology and cognition. Arrival is the exception and not the rule. Having sex with an alien seem a big trope (and yeah for some reason author like to think of convolutied way to make offspring work in that case. Like for Asari, they have a whole pseudo scientific "makes a clone of themselves but can take DNA from the father" to justify it even if we know that there is no single reason that other lifeforms would use DNA as encoding).
In stellaris they already added a biocompatibility perk. I imagine that in that case "special" aliens are not far fetched (plus look at the aliens in stellaris, 90% of them are antropomorphised animals)
True. Which is why I would call Stellaris a space-fable rather than scifi. I mean, it IS a fable - the majority of the species are intelligent, talking animals (or plants... or fungi) from Earth. It is basically just the wise owl that is missing. ;-)
I would love a scifi game where aliens were truly Alien. Moo3 did that to some degree, or at least went further from antropmorph aliens than most games.