I don't think anyone was ever truly traumatized by that book. Have people not read traditional fairly stories, like Hansel and Gretel? They are freaky scary.
Trying to make out you have some kind of PTSD due to it is pure hyperbole.
The difference is that no one read their children Hansel and Gretel and used it as a threat of what would happen if you dared have a thought different than their religion. Lots of exJWs also talk about how upsetting it was to think that their god was going to destroy their school chums, extended family, etc. The Bible Story Book also was the first to expose children to the idea that it's your fault if you're raped, that your brother might kill you if he's jealous of something you've done, that demons might come down and have sex with you, etc. This was also a book that a lot of parents studied with their kids over and over even as they got older. I think it's shortsighted to brush it off as doing no more harm than scary fairy tales.