A: If you look more closely at TranSentience, you’ll see that the majority of its extraterrestrials are sophonts with bipedal traits. Don’t let your eyes deceive you, though. We don’t strive to stick to a specific style or genre, nor are we “obsessed” with the shape. Diversity is important, and we enjoy giving our aliens different looks based on their evolution, biology and biosphere, which is why some of them also have pretty strange appearances. Since there are practically endless design options, you can’t make a sci-fi scenario with just four sophonts and claim that diversity is covered. However, that depends on the setting you’re creating or seeking out.
We may speculate that many pre-civilization life forms adopt bipedalism since it is a very practical posture, even if bipedalism in aliens cannot be scientifically proven because humans do not know what advanced extraterrestrial life actually look like. Some sophonts don’t need it if their bodies are already arranged in a way that makes dealing with challenging situations easy.
We could go on and on, but we’ll just say this: People like things that they find visually appealing, things that make them happy. We won’t even try to convince you to approve of bipedal aliens if you don’t like them and find them unrealistic, humorous, or boring.
Additionally, keep in mind that, just as sapient is not equivalent to sentient, bipedalism does not equate to humanoid. It would be like comparing snails with crows. And let’s face it: Wearing silicon masks is a thing of the past. However, neither the new creations that aim toward humanoid aliens nor the oldies are inherently terrible. They’re fun and unique in their own way, just like everything else an artist creates.