Please do not use the occasion of the death of thousands of Iranians in a war we launched against them as some sort of illustrative point about return to office and birth rates in the West.
Like the saying goes: lemons -> lemonade
Finding good among the bad is such a commonplace occurrence that my native tongue, English, has many metaphors for it. I already mentioned making lemons into lemonade; there is also "every cloud has a silver lining," "every dog has his day," "light at the end of the tunnel," and "April showers bring May flowers"
I suspect you would respond, "but Mayflowers brought genocidal white settlers!!!!"
That's your problem, not mine.