That is 100% valid but look sometimes art imitates life. Some stories can’t have perfect endings.
Blizzard’s writers took us here, they set the precedent and what they did is depressing as hell.
But there is really no solution on a meta level or lore level currently that would let NEs stay on Kalimdor and thrive while the Horde threat is still present
The locals around US military bases would disagree but what do I know. Its not like I read an article every couple months about some US soldiers committing some crime abd getting transfered off somewhere else