It's the trolley problem. Save two crew members or this new guy? I think her only moral obligation would be to try to find a way to save the new guy as well as her crew. But I haven't seen the episode yet, so maybe it was more complicated than that.
nah, it wasn't complicated and tbh she made a good choice - saved those two from a transporter malfunction. imo it was an interesting episode (unlike the dozens centered around holodeck) but in no way they'd replace tim and ethan characters with tom wright's tuvix; it was just a "what if" story and years later, it still propellers endless discussions
I'm thinking more of the transplant problem: is it ethical to kill one person to harvest their organs to save five people who need various transplants to survive? It was a follow-up to the trolley problem to explore how something more active than flipping a switch affects people's answers. Plus there's a tie-in with the Vidiians.
Random aside: have you seen this video where Michael from Vsauce notes that no one had ever done a blind trial of the trolley problem, and goes about rectifying that? It's kinda wild
It's more how quickly she made the choice. TNG writers would have had Picard at least talk it over with Riker or make some kind of speech justifying it.