Upset Children in Public

I was recently on a few airline flights. On a couple of those flights, there were young children (toddler or younger) who got upset at some point during the trip. On past flight experiences, I have found myself become frustrated with the noise, especially if it continued for a long period. Since having my own children, that has changed. During my recent flights, I found myself feeling sympathetic instead for the child and their parent / caregiver who was trying to calm them. I assume this to be similar for many parents. This is just one aspect of myself that has changed since becoming a father.