... I'd want to be a traitor any day...
Lets pick a specific day: April 1, 1940
On that day Bletchley Park was reading the "email" of the German government, having broken the Enigma code - a fragile achievement that could fairly easily be foiled, perhaps permanently .... if the Germans knew about it. As a result of breaking that code, and keeping it secret that it had broken the code, the rights of the German government and people were trampled. The trampling of the rights of the German government and people in that fashion meant that Britain would not be starved into submission by submarine warfare, and ultimately the Allies would win the war. That meant that the trampling of the rights, including the right to live, of the people of Western and Eastern Europe by the then Nazi German government would come to an end.
Beyond that, the ability of the UK and US to read Enigma type machine encrypted messages carried over into the Cold War (which at various points nearly flared into a shooting war, including nuclear war) and played a role in helping the West obtain the intelligence necessary to defeat Soviet Communism which killed far more people than the Nazis did.
So, would-be traitor, is that still a good day for treason for you, knowing that Britain would likely have been starved into submission in WW2, the Nazis might have held on, and Soviet Communism might have lived on indefinitely? Many millions more would have been killed, several genocides would likely have been completed, we might still be faced by both Nazi and Soviet regimes, but nobody would be trampling on the rights of the German people by reading their encrypted mail. But I take it you're OK with that since it is "any day," right?
Isn't there an April 1st coming next year? And the year after that? What battles might be lost then?