I would think a person has a right to know when a diagnosis has been applied to them for a variety of reasons. One, in the case they feel it might be incorrect so they can work to get the correct treatment. Two, in some cases effective treatment, both therapy and meds, can be somewhat dependent on that diagnosis and I prefer to know the rationale for my treatment (which is generally based on diagnosis). Three, a correct diagnosis can help a person gain a better understanding of what is going on with them, give them an opportunity to educate themselves about specific issues they are seeing in themselves.

Not everyone wants to know their diagnosis, and some feel "saddled" with a diagnosis. That's very true. Others of us find knowing the diagnosis actually rather liberating because we can finally understand what the heck we have been experiencing and see that we are not completely alone in these struggles. We can research best practices for treatment and advocate for the right approach for ourselves rather than blindly following what the doctors or therapists are doing because we really don't know what they are treating. I'd rather be an educated consumer of my care.