What we have here is a clear case of willful ignorance on behalf of these so-called adult Christians. They have taken the myth literally, and piled so much onto it that they cannot see the forest for the trees. They refuse to believe that they are hold-outs to a sun cult.

They won't see it, because their egos WANT so much for the literal version to be true. They want their eternal life. They want their heavenly father (Sun) to be a real conscious person, rather than a ball of fire that provides mere illumination.

They have anthropomorphised their Sun to the point where they can no longer recognize the original object of their worship.