The RAF operated an night because it saved bombers from being shot down.
Yes it did. The USAAC bombed during the day because nighttime bombing killed to many civilians due to the inaccurate weapons of the day.
In 1939 and 1940, the RAF tried daylight bombing using scrupulous military targets only rules of engagement.
The RAF Bomber Command nearly went out of business due to tremendous losses from overwhelming German fighter and antiaircraft artillery defences. RAF bombers didnot have the heavily armed bomber aircraft or the evolved close formation tactics that the Americans later used. The switch to night bombing operations was essentially a measure to preserve the RAF bomber force while still continuing to inflict some casualties on the enemy.
Germans were obliged to do the same thing during the Blitz when the Spitfires and Hurricanes ripped the Junkers, Heinkels, and Dorniers to pieces over southeastern England.