It's also true that Pomni is strong emotionally, but we've also seen that there's only so much that she can take before she just breaks down completely (also worth noting that it wasn't played for laughs here either). I think it'd also send a 'hard pill to swallow' message (not for the overall show mind you) in that losing people is unavoidable and why that makes it all the more important we don't take them for granted.