Who said that??
Jake said that on Oprah. Not in exactly those words. I think he was saying that had they known it would be such a cultural phenomenon, they might not have done it. Which is not to say they regretted doing it - they just may have seen it as a more daunting task from the beginning.
And I don't think Oprah's questions were good in any context. But then I think she asks idiotic questions about everything, so I'm not the most objective person in the world when it comes to her. I will say that the question that annoyed me the most (and that's saying a lot) was the one about their relationship with each other after they were both married being "conflicting" and the way she emphasized that word.
To me, if all you see in this movie is a couple of guys having an illicit affair and hurting their wives and families in the process, you've totally missed the boat. And to me, that's all she saw.