Oh, I like the idea myself. But simply saying the only arguments against it are 'we want new players to be weak' isn't being fair to the genuine issues that are being brought up.
Another example, the international affiliates that were objecting, in Spain and Ireland. Their entire national chronicle is less than a year old, no one above MC2 or 3, no one higher than 11th gen. Dumping 100XP on every player's head would, according to their STs, completely destabilize the existing story, effectively forcing a hard reset on them. Just suggesting that they pretend the addendum didn't happen is more exacerbating the 'old boys club' issue more than anything, by more or less explicitly telling those new domains and affiliates 'we don't care about your game, we're doing it this way, but feel free to ignore it if you don't like it'.