Bahadi Kavshi dRachmana lama lach. Mai d’mifkadta ibai lach l’me’evad. Uma dnicha kamei Kudhsa Brich Hu l’avid. (Brachos 10)
We do what we are told and don’t make other worldly cheshbonos. We are told to be osek in saving Jewish lives so that is what we do. What they do with their gift of life is their decision and nisayon.