Well, I disagree, but really it's a matter of semantics. I think if you experience a sense of relative happiness/fullness when expressing you're true gender, then you've really been experiencing gender dysphoria this whole time. Much like someone whose depressed doesn't necessarily realize they're depressed until they realize what happiness is like. The world seems anew to a depressed person whose found joy, just as it does to someone whose experienced dysphoria does when they get to be themselves. The dysphoria wasn't necessarily crippling pain for them, but rather a dullness that couldn't compare to the way life is supposed to be.

Though, you might disagree and argue that dysphoria has to have more explicit negative symptoms, hence why I said it's a matter of semantics. No word really has a set meaning, but is given meaning by how its used, and different people have different exposure to the same words. At least, that's how I see language.