“Be strong and courageous” (Joshua 1:9; Jeremiah 1:8) is a command from God. What if everyone obeys this command and courageously read the Bible without the help of religious leaders? They will all come to the conclusion that Bible is filled with human thoughts and imagination.
See how the book of Exodus is made. The way many times Israelites had to quarrel for their basic needs such as food and water shows that God was not leading them. (Exodus 17:2) If He was really leading them, He would have taken care of it without anyone asking for them (Mathew 6:8) At one point they were even about to stone Moses (Ex 17:4)
If God would not lead people the way it is depicted in exodus then it means accounts are just human thoughts.