Regardless of what it might often seem like, poetry is not about keeping a diary, but capturing moments and ideas, real or imagined, that are worth being recorded as a memoir of the human experience as a whole. We do not assume that all of Shakespeare’s sonnets were written about someone he knows. They might have been inspired, but to call them so personal is to degrade their value as a whole.
Poetry is not about truth in experience; it is about truth in outlook. When I write, I almost always end up turning the poem around in the last few lines, in order to offer the glimpse of the hope at the end of a storm I see as essential to a happy outlook. Others might write differently, to match their outlook on the world.
Furthermore, some of the best writing is the over-exaggerated type. Few get excited over mediocre love or sadness, but not everyone lives in such a wildly emotional world, and they’re lucky to be so.
So the right thing would be to stop, stop the assumptions. A writer is not always writing about themselves, just as a painter is not always painting something she can see.