The campaign poster remains cheerful through weather its candidate never stood outside to experience.

The image stays fixed and cheerful through months of weather nobody in it endured. It was made once, in good conditions, and it goes on representing a person through everything that follows without being affected by any of it. Representations do not age with the people they represent.

That is true of any polished version of yourself you leave in circulation: the profile, the biography, the impression you made three years ago. It keeps smiling regardless of your actual year. Be aware that people may be relating to that fixed image, and that updating it, or telling someone how things actually are, is sometimes necessary.