If it's about the mere mention of suicide, your story opened with your antagonists forcing 90% of humanity to kill themselves while begging for the remaining 10% to be spared. And your latest chapter contains sympathetically presented and sympathetically received apologism for such actions. You keep trying to leave the door open to the interpretation that they are sincere in their claims to actually care about all sentient life, are horrified by their own actions, and have a good reason for what they do. In terms of "Doyalist" story construction you have the relatively reasonable and wise Amanda entertaining the possibility contrasted to the mentally unstable Kalhia being the only one to reject their self-serving justification out of hand, implying that not giving genocide apologism a fair hearing is something only mentally unstable people would do.
It's quite gratuitous, you could show the Shiplords actually taking desperate actions and risking things of value to themselves in a search for alternatives (e.g, demonstrating the strength of their own convictions as I suggested - I'd be willing to accept the framing of decent people who believe they are forced into horrible things if we actually had that sort of example, it wasn't a call out of spite), or just explicitly show the humans resolving to break the system alongside contemplating the worth of individuals rather than coyly leaving approval for the whole thing up in their air (I.e, no, it doesn't "go without saying" that bad things are bad when you're stretching to give the people doing bad things a sympathetic portrayal).
I'll remove explicit words but I believe I'm within the bounds of thoughtful presentation that you've demonstrated.