I find it strange that you say that so soon after the commercial release of a film in which virtually all of them do just that....

The astronauts are anything but reluctant to talk about their experiences. They've written books, apeared on television, spoken to the press and to authors. Many of them are selective about whom they speak to, and Armstrong has to be especially so because he was the first. If he answered every single request to talk about Apollo 11 he'd do nothing else with his life, ever.

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"The very powerful and the very stupid have one thing in common: They don't alter their views to fit the facts, they alter the facts to fit their views." The Doctor, Doctor Who: The Face of Evil.