^ I mean, Edelgard does canonically create a democratic, prosperous welfare state in her ending, and presumably also exposes all the shady bullshit Rhea pulled to the public. I'm pretty sure Catherine would be amenable to Shamir's reasons after she had some time to cool down and see the results. That's the funny thing about FE3H- people criticize it for giving each house a happy ending in which they create perfect societies, because that's definitely not the way war works, but it serves as a great demonstration of how history gets penned by the winners.