you are assuming that Christianity or the Bible is wrong and practical life will show proof or hard evidence against what the Christian doctrine says.
But thats an assumption you make, Christianity is a general set of beliefs and purpose, and a framework of thought, and a way of life, and other things and its impossible to boil it down to "he thinks planet Earth is 6000 years old", most Christians are not interested in arguing about literal quotes from the book or with people who think about us in bad faith and make wrong assumptions. There is often a dishonest intention in how we are approached, as if the person has already decided we are delusional and they are intellectually superior.