The last time I checked, Tiger Woods married one woman. He had children with that one woman, and he pledged before one God that he would stay faithful and honest to that one woman. The last time I checked, she's the only person who deserves an apology for his infidelities. In this era of "news" coming from social media sites, gossip blogs, and thirsty columnists looking for a way to write controversial articles that drive traffic to a website, the public has extended their sense of entitlement to new heights (and lows).
I don't give two damn's about Tiger Woods cheating on his wife. He didn't commit a criminal act, he didn't break any laws, he didn't harm anyone, and unlike politically affiliated cheaters, his bad judgment doesn't affect what he does for a living. Golf and most of the sponsors who dropped him from their roster will notice that without Tiger, they have a replaceable product. The man didn't reach billionaire status because he's your everyday athlete.
People today have become so invested in celebrity gossip that they've forgotten where to draw the line for what's off limits. Just because a celebrity makes a mistake or does something stupid, doesn't mean they are entitled to explain it to the rest of the world. Imagine if you cheated on your spouse, and lost your job, your friends, and possibly your family. How much more humiliating would it be to have to stand in front of the entire world just to say you're sorry?