The same issue I have with all religion. It claims to know the unknowable and offers an instant answer to unanswerable questions. In doing so it closes people's mind to seeking truth.
Organised religion stands in the way of progress. Claiming the earth is just 6000 or 10000 years old robs us of understanding the true awe of our existence and the billions of years that the development of life on earth has taken. It stops us taking full responsibility for how we treat the earth.
Truth is not a rigid set of beliefs. Once we think we posses the truth, we close our minds to other possibilities. In that moment we have lost our connection with the infinite.