Why did Bill Anders quit the Apollo program when he was slated to be on Apollo 14?

Question

Why did Bill Anders quit the Apollo program when he was slated to be on Apollo 14?

Answer 1

NASA selected Anders as an astronaut in 1964. After Mike Collins had to leave the crew due to an illness, Anders received his first flight assignment on the Apollo 8 crew, together with Commander Frank Borman and Jim Lovell.

A last minute decision was made to send Apollo 8, only the second manned Apollo flight, into lunar orbit in order to beat the Russians. He was the lunar module pilot for the Apollo 8 mission.  December 21, 1968, the Apollo 8 crew became the first humans to reach escape velocity as their Saturn V put them on a trans-lunar trajectory. Early on Christmas Eve, the Apollo 8 command-service module braked into lunar orbit.  Anders took a photograph of "Earthrise" that has become one of the most celebrated of the US space program.

In an unforgettable Christmas message to the world, Borman, Lovell and Anders read the story of creation from the first ten verses of the Bible's Book of Genesis, while sending a vivid televised image of the stark lunar surface rolling by below. On Christmas Day, Apollo 8’s engines pushed the crew out of lunar orbit and back toward Earth to a landing in the Pacific Ocean.

He served as backup command module pilot for the Apollo 11 mission.  The President subsequently appointed him to serve as Executive Secretary of the Aeronautics and Space Council, working to increase national support for aeronautics research and development.  He was appointed to the Atomic Energy Commission, named the first chairman of the Nuclear Regulatory Commission, and later served as U.S. Ambassador to Norway.

I guess he thought Executive Secretary of the Aeronautics and Space Council was a step up.

Answer 2

Health problems I think.  Heart maybe, I dunno.

Answer 3

guessing he got tired of breathing other guys' farts.