You always think that 70 is the end of the road: 'Somebody died when they were 73 good life'. You're closer to death and you better make sure you don't waste too much of your time doing things you don't want to do. No point in saying things you don't believe in.
For a competitive junkie like me golf is a great solution because it smacks you in the face every time you think you have accomplished something. That to me has taken over a lot of the energy and competitiveness for basketball.