Eren's persuasion was very effective.
Maya was made to realize that she needed someone from the outside to help guide her.
She had almost all the knowledge about the continent of Anfang itself. Her creator made sure to equip her with various kinds of information before leaving her to her devices.
However, it had been a long while since Lin Lehan had left. And there was a difference between what one knows from firsthand experience and what is learned through other mediums.
At first, Maya thought that she didn't need Eren's help. But the more she talked with the butcher and the more he told her about the consequences of her exit, the more she realized how naive she was. As a result, Maya subconsciously started relying on Eren's input in her escape from Edinburgh's clutches.
Maya was very perceptive.
She had all the intelligence she needed to understand what Eren was saying to her. And she had to say that she couldn't come up with the kind of plan the butcher had made on the fly.
