Where this analogy falls apart is in the implicit assumption that this is just a one-off situation. (I mean, most people only have two parents.)

What happens when it’s an iterative phenomenon? (Politics is an ongoing thing.) Then, the situation in the analogy turns into the classic “negotiating with terrorists” scenario. The received wisdom is that one should never negotiate with terrorists, because once they learn that terrorism works they’ll do it again.

Maybe make it cousins. Do you choose the option whereby two cousins die, or just one. What if choosing just one now increases the danger of more dying later?