Surely the level of stress needed to have this impact is something that needs to be studied. The researchers presumably went to an extreme to ensure a clear signal for a result, but the fact they've shown there is a significant outcome the next step is to work out how much stress is needed to cause a long term problem.

You can't just dismiss the result because you think it's unlikely to be something that affects a lot of people.

There is a theory in transactional analysis therapy that states adult addiction (in all its forms) pretty much always stems from childhood trauma...