You only consider the conservatives here, assuming that everyone else will fall in line automatically.
But well, many of them are not all that popular, openly leaving behind our own allies to pander to them could easily lose us as much support as it gains.
Would we rather have the supports of the conservatives, who already hate us, and will hate us once more once we start doing stuff, or that of the radicals, with whom we can make common cause?
The art of compromise at a diplomatic summit isn't to make some people happy at the cost of making some people angry. That's would be a failure.
The goal is to make everyone grudgingly content so they sign up to the resulting treaty.
The radicals don't know the counter-factual. They won't know that we could have brought the Ishari and made a divisive political statement by exploiting their presence.
They've no reason to oppose sensible suggestions we make that we can argue for on their own merits. They're starting off neutral.
And Aliaitoc don't hate us. They don't like us, which is not the same.
Bringing the Ishari alienates some people. That makes a common front harder. The more people at alienated, the disproportionately harder it is to work with them, while it's relatively easier to convince people who start off neutral.
I don't think we need the Ishari to be able to talk productively with the radicals. I do think we probably need to avoid bringing them to be likely to deal productively with many conservatives.
Keep in mind that what the Ishari did ?
Yeah, we want to do the same (reforge our soul) and pretty much everyone in the meeting knows that.
What they don't have so far is proof that the reforging can actually be successful (even in theory), they actually practical proof that it can be done.
How? How would they know? I don't think we know IC that we're going to do soul reforging
We've rejected using the Paths. So? Lots of Eldar reject the Paths without going for soul reforging.
The Harlequins don't use the Paths
The Exodites don't use the Paths
Eldar Corsairs don't use the Paths (being a Corsair it's dangerous, but they can survive off the Path for centuries, we're currently basically a Craftworld of Corsairs)
Eldar Rangers don't use the Paths.
Not using the Paths is a standard and normal things that many people at the conference prefer.
OOC, we may even not use soul forging if we keep rolling amazingly. There are theoretical paths to break the Curses with no soul forging required.
Revanchists. Dislike Soulforging, to the point of Kinstrife.
They dislike our vocal rejection of refounding the Dominion. They probably have no idea we may one day reforge our souls.
