Of course, Tiger's lies affected him, his wife, his children, probably gave great amount of pain to relatives on both sides...typical fallout made worse by being the focus of media attention for a couple of years.
Lance Armstrong lied and then tore people up whenever they told the truth about him. He annihilated friends, fellow cyclists on his team, and then contacted at least a couple of them on the phone in preparation for the Oprah interview and refused to retract the lies he told about them when they had told the truth. He never apologized to them for hurting them, ruining their reputations, causing them intense emotional suffering, and sidelining some of their professional careers. He was vicious and vindictive.
He seems to fit the pattern of the self-involved jerk who does public acts of charity to feel better about himself and to add value to his $brand$. I'm sure he cares - fighting cancer - something that threatened his personal well-being and am appreciative of the livestrong foundation.
I hope that he faces civil and criminal charges for his actions. He is responsibility.