Kirsh and Hermit don't seem to know that FTL has been around for almost 90 years.
Technically there isn't any FTL travel in Alien(s). There isn't in most sci-fi. It's all accomplished by things like warping spacetime or inter-dimensional travel, bending the rules, while actual FTL travel is theoretically impossible according to everything we know and that holds true in these worlds. Actual FTL travel would probably solve a lot of issues, since in most of these fictions warping spacetime or traveling inter-dimensionally tends to lead to bad things like people going insane, damage to the fabric of reality, or opening gates best left closed.
So there's a viable explanation there.
That aside, Wendy is the real monster of the show.
You say it like you think it's unintentional. I kinda figured the show would go in that direction the moment they introduced the concept of putting young kids in super-bodies. From the moment they introduced the idea it scared me more than the notion of a space monster eating me. They seemed to double down on the, 'these aren't your heroes, they're the horror," thing with Nibs and... her whole... everything.
Children have very different ideas than functional adults when it comes to morality, ethics, loyalty. They also have less self-control. You give them what amounts to superpowers and it's honestly nightmare fuel. We are, I assure you, very lucky that kids are small and weak.