Some humility would serve you well.
Some babies, even toddlers, scream loudly for extended periods with no way to console them. Our neighbor a decade ago had one such child. They were great, loving parents. The kid was obviously happy and content. Yet, every night, for several hours, she was a siren. They saw lots of doctors. They started with co-sleeping, for what it's worth. In the end, a separate bed and a parent reading a book with ear plugs [for several hours] seemed to cause the child the least distress.
When the child was 2, and still screaming, a new neighbor moved in. They spread neighborhood gossip of child abuse. They called the police and child protective services. Luckily, their case was so well documented, it was not an issue. The issue was "resolved" with better soundproofing.
The kid is a teen now. Extremely kind, well adjusted, helpful, smart, and, a sound sleeper. She's obviously loved very much her entire life. I think the parents did a great job.
Shrieking children for hours is very much a modern phenomenon.
yeah it’s a modern phenomenon because overzealous regulatory agencies gatekeep parents’ access to opium lotions
It's basic common sense, if babies evolved to scream for no reason for long hours in the wild, early humans would have been killed off by nocturnal predators ages ago.