What is the point of Sarah Sanders?

The amount of spotlight on the White House press secretary is often inversely proportional to the fortunes of his or her administration. When asked to handle dozens of questions on different issues with verbal dexterity, even the most capable can stumble and stammer at times. All that's expected is to not create new mistakes that could have been easily avoided. So it really says something that current press secretary Sarah Sanders can't even reach that low bar.