Tom is highly intelligent and a deep thinker, and even when he won the Giro he was a nervous wreck always thinking what can go wrong. I also believe his physical issue when he had to get of his bike was as much mental and stress related. There is now way he comes back, he started cycling at a late age and realized he is good at it, but he does not love it. He will enjoy his newfound freedom so much that he will never want to go back to the grinding and stress needed to win the Tour.
I agree with another poster that he is suffering from depression.
I agree with another poster that he is suffering from depression.