> Buying into any religion does away with trust in your own mind and does away with uncorrupted critical thinking.
I would challenge that. It may be true if you buy into the religion blindly which, of course, many do. But a number of intellectuals, by applying critical thinking, have come to the conclusion that the God of the Bible really does exist. CS Lewis is an obvious example.
I believe that is the case for me. I like to think, and my thinking has led me to the conclusion that there must be something behind the universe, and that of all the religions vying the explain that Something, historic Christianity wins by a mile.
When you're convinced that Christianity is true, there is still a lot of room for critical thought. I like to think about theology and debate various theological positions.
Also, I can trust in my mind because I believe I am made in the image of God. It is God's nature to be rational and He has created us with rational minds. On the other hand, if matter is all there is and we are here only because of chance, how can we trust our minds?