It's very typical for there to be overlap between inevitability and environmental circumstances
Guess and check sounds crude but it's fairly effective on a range of issues. It's guess and don't check that causes a problem. Or guess and don't try anything else, etc.
Edit: I suppose you might be concerned someone never has the cptsd treated? I think that makes sense as a concern. However, I don't think treating the ADHD if the meds do that has to block investigating the cptsd. A lot of people can't do all that inquiry until more of their life is stabilized anyway. Cool if you can go straight to cptsd and that means you don't need ADHD meds...but nothing wrong if you go to ADHD meds, eventually discover trauma angle, and can back off the ADHD meds.