I trust the Bible as God’s word and absolute truth. It is the ancestry that the Bible describes in great detail that allows for 4,000 years ascribed to Old Testament and 2,000 to the New Testament since Jesus Christ walked the Earth.
Besides Bishop Ussher, Sir Isaac Newton also calculated this lineage and these 2 highly historic Christians came within 10 years of each others’ calculations.
So you’re comfortable with dismissing the idea, supported by thousands of observations, measurements and calculations, that the earth is older than that?
You’ll have to dismiss giant swaths of science to do that.