Genetic predispositions also aren't necessarily written in stone. At this point, we have a lot of research showing genes can be turned on/off by diet and environmental or nurture-based factors.
Pretending it's OK for kids to be traumatized if we can just drug them or have them speak to a therapist once they're older (or increasingly now, starting from childhood) has never made sense to me. It's not like either of those things cures people. The treatment bar being set at life being just okay enough to hold down a job is shortchanging everyone, societally, even those making short-term profits.
We should be looking for ways to eradicate serious mental health issues that affect people's ability to function, not just make them easier to hide.