A sister answered up at the WT and said "even if Armageddon isn't coming, its still the best way to live."
I have heard others say: "even if it isn't true, it's still the best way of life."
The key here is the "if". By using the "if", they are deflecting any need to confront challenges to their teachings or faith. The do not acknowledge there are issues, nor do they affirm that "it isn't true"--if they DID, they would leave, as we have.
Instead, they say "even if"... this allows them to continue to teach it "as truth" to those they meet in the ministry. "If" they really did not believe it was true, they could not, with good conscience, teach it to others "as" truth.