LOL!
You act like people are going to suffer from PTSD because god forbid they are on the plane with a child that might cry. And here you are wanting to inconvenience millions of families so that you can get with you want. Funny how that works both ways, isn't it?
As I said before, the onus is on the family to weigh their needs against the needs and well-being of the other passengers. If they have the will or ability to control their child and minimize the potential pain for everyone else, all is good.
But this family was clearly not equipped to take care of their child in a way that allowed everyone to go about their business. They made their problem into everyone else's problem. When I was a little kid, I had periods of bad behavior and threw tantrums from time to time, and you know what happened? If I started being a little shit when my parents wanted to take me somewhere and wouldn't let up when they told me to stop, they
cancelled the trip. I got punished by not getting to go to the water park or visit my friends or go see Grandma for my birthday. They didn't let me ruin everyone else's day and they were willing to sacrifice their own desires (
and mine) for the good of other people.
The mother just sitting there and occasionally going "honey, calm down" and not following her hellion around the plane to try and shut him up is an incredibly bad look. It's your brat, that means it's your responsibility. A plane is not your own personal day care center.