They didn't say 'powerful people don't lie', they're saying that they're so powerful that they simply don't have to. If I was in the business of chaos, I'd understand that a damning truth would be far more impactful than prancing around spreading little porky pies. You also have to account for the fact that both Elidibus AND Solus (despite not being an emissary) have discussed the 'balance' and maintaining it, though it's easy to assume that despite knowledge of the balance, both Solus and Elidibus would have different methods/ideal's on the subject and that Solus is clearly the more likely to favour full-on Zodi over the way things are now.
Even then, he has no reason to lie about the topic. Doing so would just lead us to some digging before coming to the conclusion that it's a farce, unless they write it in a way where it IS a lie and that said lie causes a rift with the Scions/WoL/Hyde, but it's very hard to see that happening when we've essentially been following that road since ARR.
I just hope the emphasis on WoL's headaches isn't going to become some sort of "Oh, I actually am tempered. Whelp, resisting it hurts my grey matter". Also not likely.
