Trust me, anyone who can live the life of even a minor celebrity and still remain gracious and polite to all the idiots you run into, is at least a minor saint.
It's not just idiocy most of the time, though on occasion you run into that as well. You just don't always want people to know certain things about you, even such things as how you think about certain problems, or in what way.
It's really none of their business and sometimes it's dangerous, not only to you but potentially to the people around you.
Even when it seems perfectly innocuous.
As a fella who has conducted interviews, and as a fella who has been the point of a few there is always a tension between trying to learn things about a person, and trying to conceal things from a person.
And it doesn't always come off in print that this is what is actually happening. It can often seem like hostility in script, when in person it was more like a psychological wrestling match, or a psychological chess game. I'm not saying this is the case with this interview, I wasn't there. And I'm not really defending anyone, just stating this as general background. You cannot overlook the fact that after you've given a few interviews and written up a few you soon learn that things said out loud can often sound completely different when transcribed in script. If you don't become wary of that fact then you really never learn how interviews really work.
I can say this. There is a certain art to the interview, and picking the right questions or asking your questions in the right way will often elicit a far different response than if the same basic questions were merely formulated differently. I've also never met a single individual who always gave a good interview.
And I'll also say this. I have on occasion lied during interviews, either to avoid a question or to intentionally misdirect people. I've also feigned a particular attitude or posture just to present an air that either made it easier or harder to conduct an interview. I've even hired people to play me to avoid interviews. I'll do it again no doubt. And not feel bad about it at all. Interviews are never more important than what you to discover, don't want to discover, end up disclosing, want to disclose, or want to prevent from disclosing. And there's more than one way to skin that alley-cat so he purrs while you're kuttin.
It's just something you learn over time.