What's the logic behind men on Survivor hiding the fact that they just had a baby?

I feel like we've seen it before, a man in confessionals saying "I just had a baby, nobody knows", and maybe with strangers you don't want to give them the idea to send you home to take care of your infant, but Christian is on a returnee season where it's pretty standard for them to be new moms or dads. It seems like he avoided telling his friends that he had a baby because he wanted it to be a secret when he would play season 50. Why?