I have no clue what dataset this particular AI is using, but these remind me of a discussion I just had with someone about what I like to refer to as "Star Trek aliens". A Star Trek alien is basically just a strangely colored human with some extra bits. Head ridges. Pointy ears. Blue skin. Glowing eyes. But always basically just humans. This is, of course, so that human actors can portray them on television and in movies as both friends and rivals of the largely ordinary human main cast. Still, they reinforce this idea that human beings look for themselves in the cosmos instead of trying to imagine something radically different than themselves.
To paraphrase Neil deGrasse Tyson, in all likelihood, an alien is more different from a human being than a human being is from any other creature on earth. We probably have more in common with a jellyfish than we do with any extraterrestrial forms of life.
That's why I like to imagine the Thargoids are startlingly different from us. The fact that their spaceships are bioengineered suggest that they might actually have more in common with plants or fungi than they do with us, and that would be amazing, because it would at least be something different.