Why not have a kid when it's very clear that humanity has never been in a more precarious state of affairs?
Meh. People were making babies in Europe in 1943, during China’s disastrous “Great Leap Forward”, even during the height of the Black Death bubonic plague.
Not logical, but there’s no stopping people wanting to have sex.
Big difference between having a kid and having a kid on purpose.
Life finds a way, it seems.