Though I don't really agree with it (in theory more than practise!), I think the argument is that people use their condition as a label in order to restore some confidence. I did decide to identify as 'gender dysphoric' in my head for a while because I was grateful simply to have found the answer. Something was missing in the way I saw myself, and then I realised "I am gender dysphoric", rather than what is true today, "I have gender dysphoria". It's an easy and comfortable trap to get into.
Shawn's dead right, and I find people often misuse the labels too - they'll claim to be OCD (which doesn't even make sense as a sentence) when they're probably nowhere near having such a disorder. That gets annoying, as it shows a disrespect both for sufferers and the illness itself.
Edit: Whoops, sorry Yakshini - didn't notice that you'd changed your name!