I don’t think you read the second half of my original comment
There’s no good answer on this, maybe some sort of initial generic question like “Something bad has happened to you in your past you maybe unaware of, would you like details?”
It would still cause one to worry about that something has happened to them, but at least they would have time to figure out their own best way forward before being bombarded with details
It’s pretty simple really
Detective: “Excuse me, I’m Detective so-so, recently we’ve come into some information that indicates something traumatic may have occurred in your past, are you ready to hear the details or would you like some time to prepare?”
Person: “WHAT‽ I’m gonna need some time to prepare, I’ll contact you when I’m ready”
This’ll give those vulnerable time to prepare for a shit storm and those who feel they’ve already adjusted and would rather not hear about it the opportunity to decline
Your attitude is very much “You need to hear about it no matter what or how well adjusted you are. Oh, your brain was able to process the incident without causing any I’ll effect? WELL TOO BAD YOU NEED TO HEAR IT”
Again, not every traumatic incident results in a mental ill effect like PTSD or depression. Some people have more resilient mental stability than others. What of them? What if the disclosure itself is just too much and now they NEED therapy when they could have gone their entire life without worry?