This sort of implies that all crying is the same. The data you can get as a parent is a lot richer than that. There is a difference between “stirring”, “moaning”, “calling”, and “crying”. There is also a question of whether you know in advance that your child has a high temperature, runny nose, ear pulling, diaper rash, etc.

Combining those factors allows for a much more nuanced approach than a simple, “crying == trauma” boolean.