I don't know who insisted on divorce in Reagan/Wyman. Nor do I know who insisted on divorce in the Armstrong case. I seem to recall that one of the reasons for the Wyman divorce was Ronald Reagan's increasing interest in politics. (sort of like "furthering his career")
This guy has sacrificed everything---and unlike Reagan, whose second marriage proved extremely loving, long-lasting and one to be envied, Armstrong seeme completely incapable of any relationship except with his bicycle.
I have no idea of what Armstrong has sacrificed. We do know that Lance Armstong declined an opportunity to go to the Olympic Games in Athens because he wanted to spend time with his children.
I am unable to predict with certainty what Armstrong's second marriage will be like, if he has one.
All this is not meant to tar President Reagan, whom I admire and love. It is meant to point out that the TDF threads are innundated with people who have strong personal opinions on Lance Armstrong's family life, none of whom have any personal insight.
Now, since you bring up Reagan, I've talked to people who knew him personally, and they said that his marriage was tremendously strong, but that the love between Ronnie and Nancy was almost EXCLUSIVE of the kids, hence some of the alienation. But in his case, while maybe I wouldn't have wanted Reagan as a dad, I sure (if I were a female) would have wanted him for a husband.
Not all people can balance work and marriage/family. But some people like Armstrong SEEM to go out of their way to put personal achievement above family.