> Steve wanted to become chairman of the board and teach at Stanford.

Do you have a source for this?

I've heard it from Laurene on several occasions, she alludes to it in this video

https://www.youtube.com/watch?v=sdvzYtgmIjs&t=2825s

(in case the link goes down: Tim Cook, Sir Jony Ive KBE, and Laurene Powell Jobs, Code 2022 Interview with Kara Swisher)