But those actions may result in death or financial ruin. Are you equating having a child with those?
I'm equating acting like an adult with accepting responsibility for our actions. Saying that we don't have to worry about consequences and should let God decide is childish.
It's a dangerous idea to refuse to plan or take action because we put something in God's hands. We do the best we can and then put the rest into God's hands.
But if we consider children outside of our planning or action, then fertility treatment and adoption should be rejected as well.