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A burned spirit can be saved or healed, and it's easier to eliminate an unknown spirit during the transformation phase. Secondly, the second guaranteed world after the ultimates are revealed gives the city more chances for a successful outcome.
Personally, I generally agree with you, Gur. But again, the problem is that there are no good alternatives, the clues don't point to anyone, and there are fewer peaceful roles targeting you (+ after this night, you are neither an elf nor a healer).
Regarding possible attacks, I repeat, there will always be a choice, but in this situation, saving a guaranteed spirit will be many times more of a priority than randomly saving an unknown person.