He had a good run. If you look at a lot of non contact athletes (football, MMA. boxing I would consider contact sports), a majority of them were in their prime for about 10 years. From the late 90's until 2009 or so he was overall the best golfer in the world. It happens to everyone. He probably still plays because he is still trying to live in his glory days, he loves the game, likes the attention, who knows??
However he was a trashy husband/person and probably a trashy father, so when you're not so classy you get a lot of not so classy headlines whenever the opportunity arises.