1. I never have bought the conventional wisdom that "the cover up is worse than the crime/offense". No, the crime or offense is worse, but the cover up is easier to prove.
2. I have never bought the notion that it is best to come clean. We know that Clinton had sex with Jennifer Flowers and Monica Lewinski and propositioned Paula Jones, and we don't believe that he had designs on Catherine Willey. But how many hundred more girls did he have improper relations with? I think he would have been worse off if he had confessed to all of them. How many more women did Edwards cheat with?
3. Someone doesn't attack a car with a golf club if this is the first time that she has learned of a husband's tryst. Or the second, or the third... or the twentieth, for that matter.
Remember when someone tried to blackmail Bill Cosby (liaison) and that person was charged with blackmail? A talking head lawyer said that if she had just engaged an attorney instead of doing it herself, the attorney would have constructed a plausible pretense for Cosby to give her money without it being an indictable offense.
Gloria Allred announced a press conference to show that she can draw attention. Now she gets to negotiate a humanitarian gesture of which her client is the beneficiary. Should Tiger come clean? That depends. Is there a picture of him wearing a Tinker Bell outfit, or of a devil worshiping session at which they sacrifice a chicken? It can get a lot worse...