Proportionally, Arcaea has lost as many nobles as any other current realm. In sheer numbers, we've lost a lot more. I won't intentionally cripple us further, and I doubt anyone else would do the same to their realm either.
Indeed Delvin already stated he would not personally do so to a realm he controlled, yet obviously he gained the impression from somewhere that you were going to prioritise the continuation of FEI above all other consideration.