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Whilst everything else of your post is on point, the last bit is not really applicable: you can’t really compare “lifetime” probability (i.e. for the age range 0 - life-expectancy) of getting something (i.e. “be affected by”) with the probability of actually having something (i.e. not just be affected by it at any one point but rather being now suffering the effects from it) whilst being in a specific age range (roughly 10 - 30, a subset of the lifetime one).
It might be possible to derive the second one from the first if knowing the statistic distribution in relation to age of that disorder and the average duration of the condition, but as it stands there those 38% aren’t comparable to those 33.7% as they’re statistically quite different things.
That’s not how mental health stuff works. People do not really develop anxiety in adulthood like that. You won’t wake up one day and have suddenly developed a mental health disorder. Mental health disorders require both genetic predisposition and real-life experiences, but those experiences really only affect someone in that way before their brain is fully developed.