This isn't goading anyone. Goading would be trying to force the CT at all cost players into other raids. Removing CT is about giving players more choice so they aren't discouraged from queueing. Right now at this very moment I ignore Alliance Roulette altogether, and will forever do so until CT is removed, because the existence of CT ruins the entire thing.
Every player doesn't have to like every single piece of content, that's totally fine. However the larger the pool of content is for a given roulette, especially if two totally different types of content are included (super casual CT artificially boosted in encounter rate by being low level and required vs all other Alliance Raids) the more likely it is that players will be forced to put up with something they don't want to do.
With the roulettes split, everyone who tries to force CT will go for the CT roulette. If they don't queue for the new Alliance Roulette, that's not a problem. The people that like Alliance Raids will. If they do queue for the Alliance Raids because now there is more reward for participating, then great more people for the roulette. Whatever they choose to do, at least they won't be dragging unwilling players into dull content.
I don't see that happening necessarily. CT is mandatory, a set of three raids vs just one, and almost devoid of the need to know how to play the game. This makes it more common in roulettes and is the causes of the attempts to manipulate the roulette. Void Ark won't be nearly as common. It has 1/3 the chance of showing up vs a CT raid in the first place. Some people won't even have it unlocked, and as time goes on it might actually become somewhat rare as players who do have it unlocked stop playing while new players may favor newer content.