That's why I laugh every time I hear fart-sniffers talk about how "perfect" the human form is. No, it's far from perfect, it's a jury-rigged evolutionary mess that just barely works, with the knees and lower back being the worst failure points. Archosaurs developed a much better way of being bipedal, but the human ape always lacked a tail, so couldn't use that as a balance.

And aliens with ape-like, brachiating shoulders and a human stance will always scream "hoax" to me. Hoax, or "animated wildlife decoy".