That is an epic logic fail. Other galaxies are 12 billion light years from us because the universe has been expanding in the intervening years. We are seeing those galaxies as they were 12 billion years ago, not where they were 12 billion years ago.
How do you figure we're not seeing them
where they were 12 billion years ago? What you're saying sounds like post hoc rationalisation to me - more like theology than science. You're doing exactly what "pseudoscientists" are often accused of doing - beginning with the conclusion ("The Big Bang happened") and then cherrypicking the "evidence" to suit.
TFS