I'm very skeptical of the psychiatric system. Nothing worked for me and these psychiatrists actually seem clueless about mental disorders, that's my experience. We need to improve that very drastically and make sure people get the help they deserve. But I don't know if I would go as far and abandon the whole classification system completely. There certainly are mental disorders which can and need to be diagnosed and also require treatment - and said treatment is successful for many people. But we need to have a different approach for people where the treatment isn't working. And we need to completely change the way we treat suicidal people anyway. That's what I believe.
But one of my mental conditions, for example, gender dysphoria, is listed in the DSM-5. And the current approach to transgender people is the only one that works, from a psychiatric standpoint. So we shouldn't come to dangerous conclusions based on the findings of that study. Many people are dependent on the classification because it gives a green light to very important treatment - and medication that is necessary for them to survive.