Yes, I basically agree with this, although I think it applies to the vast majority of non-religious people as much as to religious people, including in regard to religious topics. In other words it is mostly not for the sake of truth that someone holds religious beliefs, and it is mostly not for the sake of truth that someone else holds non-religious beliefs.

Also, it does mean that people are bad at discovering the truth on the topics where they do not want to discover it, just as people are generally bad at jobs they do not want to do.