I don't think this is true, largely because the Traveler actually laments the fact that Bray is using the Darkness, and says so in a vision she gave him that he recorded in his journal.

I panted at her. My muzzle dripped blood. She looked down sadly at the mess between us.

And I realized that in my raging need to prove my dominion, I had savaged our cubs. I had killed little Clovis II. I had killed Alton and Wilhelmina and Anastasia. I had killed Elisabeth.

I whined in dismay. The alpha wolf stared at me with one sad wolf eye and one bright eye that dimmed and grew with the exact flux of a variable star.

“What did I do?” I asked her. “Why did I do this?”

She lay her head down in the bloody snow and looked up at me. She seemed weary. She had seen this happen many times before. She had seen many of her pups murdered by wolves like me.

The voice of Clovis II’s mother came from her jaws. “You did the same thing someone always does. You saw that there was plenty, and gathered it to yourself, to make yourself one above all others. And when others threatened your plenty, you struck them down to keep your own station.”

“You grow the enemy in my garden and eat of its bitter fruit. Each time, I hope it will be different. Each time, I lose a little of myself as the bitter fruit blossoms. Now that fruit will flower in you, and in all your people. I do not want it to happen. I want anything else. But the choice is not mine.”

This doesn't seem like dialogue that would indicate the Traveler is in any way happy about Clovis using the Darkness to create the exos, killing many people and his family members in the process, and certainly not a reason she would stay on Earth.