This question could be taken from different angles, but try this:
The culture surrounding the Bible makes it unlikely to be corrupt.
Think of the constitution. We revere it. Every word matters. We don’t even consider it divine. It’s unlikely to me that 500 years from now, we’ll have a corrupt version of the constitution if America is still in existence. Someone, somewhere, would notice. Because its our central document.
The Bible was put in the hands of a nation that revered it – the nation of Israel. They still found their faith on it. Had it been corrupted, someone, somewhere, would point it out. Not only did they revere it as law – they considered it the word of God.
Look at the historical pains taken to preserve it, and you’ll see the same.