It would often be considered sexist to describe the personal appearance of women in public life on a news broadcast. However, that presumes the viewer can observe the women's appearance in the first place. Blind and visually-impaired viewers require greater information. Those already seated stand, clapping. Bush shakes their hands.
Regular commentators assume everyone knows what Washington landmarks look like.
Such a detail would be considered too tediously self-evident to a regular commentator. The presidential motorcade is merely described as a presidential motorcade by the regular commentators. Now the presidential limo slows to a stop. Men wait by the doors. So now we know that describers mention visual details that commentators ignore completely.