For creators and their offspring, such as Perpetua or the three Sixth Dimension Gods, it was impossible for them to truly empathize with someone like the First Lantern.
To Perpetua, the First Lantern wanted his homeland back, yet he could not abandon the false homeland created by the World Forger. That was something Perpetua could understand. But if someone placed his homeland and his false homeland on opposite sides of a scale, Perpetua had no way of judging what choice he would ultimately make.
Yes, the First Lantern might resolutely reject Batman Dragon's request for the sake of the perfect world Perpetua had promised him. But what if he didn't?
She could not empathize with the First Lantern, nor could she figure out what his final choice would be. So Perpetua could only make the choice most beneficial and safest for herself.
He briefly broke free from his entanglement with Batman Dragon, then opened his palm toward the First Lantern.
He was not worried that using some form of mind control on the First Lantern would make Doctor Manhattan suspect that something was wrong.
During Identity Crisis, the Backwards Magic user Zatanna controlled Doctor Light and erased Batman's memories. During the War of the Rogues, Spike was likewise mind-controlled and turned back to the side of good.
Identity Crisis, A Death in the Family, and Emerald Twilight—these three events were practically major catalysts for Infinite Crisis.
There had been far too many incidents in the DC Multiverse where people manipulated others to accomplish their own goals. Since Doctor Manhattan had surveyed the entire history of the DC Multiverse, he would certainly not find this unusual.
As long as things did not end with Perpetua using brute force to subdue everything, Doctor Manhattan would regard it as a normal evolution of