I'm sure it's less accurate. Look how many people say they "have OCD" when they like a clean room. How many of those people understand that they don't actually have OCD?

However, current psychology is realizing the previous ways of lumping people with vastly disparate needs into finite categories is bad and dumb and doesn't really help anyone. Turns out, making someone's mental illness easy for nobodies to talk about isn't that useful for treatment, while extreme nuance and personalization IS really good for treatment.