Because the university’s allow them to investigate their theories
Having three branches of government prevents one branch from having too much power
Protected by the First Amendment to the U.S. Constitution, a free press helps maintain the balance of power in government. Numerous journalists worldwide have been killed while working to fulfill their essential role in free and open societies.
I believe it was because the government was afraid that they might be spies for Japan, so they thought it was safer to keep them in one place so it would be easier to keep an eye on them. It also stemmed from racism due to the attack on Pearl Harbor and the U.S. fighting against the Japanese in the Pacific.
