Would the Emergence have really destroyed the Earth?
We can see Tiamut starting to come out of the planet, which is obviously catastrophic but we can also see the celestial is coming out of the ocean. Provided Tiamut was careful about leaving the planet. As in it doesn't spread eagle the planet and minimizes the surface area where he comes out, would Earth survive?
Could the Eternals have just Uni-Minded with Tiamut and told him "Hey, as you come out, be careful. The planet you're inside houses very important people and it's critical that you not kill them all"?