They quit because of the questioning by Smith makes them witnesses. If they felt Trump had lied, why were they on TV after the indictment supporting Trump.
You don’t b3ecome a witness unless you have damaging testimony. And they cannot be compelled to reveal that damaging testimony unless they were being used to facilitate a crime. Which they were.
Maybe you should read the indictment BEFORE making comments on it.
https://abcnews.go.com/US/sources-special-counsel-claims-trump-deliberately-misled-attorneys/story?id=98024191