system
Given the following post, respond as if you're commenting on Reddit:
human
[Mass Effest] Why Shepard asks turian primarch for help and rants about Earth while Palaven is literally burning in the background? Why Earth is more important than Thessia and Palaven?
gpt
Because the primary Reaper attack hit Earth first. (okay, technically they hit the Batarians first and effectively ended their civilization in an instant, but no one cares about Batarians) The Reaper's biggest fleet, the focus of their attention, and the goal of their entire invasion, seemed to primarily revolve around Earth and then spread to other systems. Of course the rest of the galaxy was simultaneously burning. But if Shepard didn't do something ASAP, Earth would be permanently lost and humanity put in severe danger of extinction long before any of the other species in the galaxy. 

It was a lose-lose proposition for all involved, but Shepard wouldn't stand by and watch her home die while there was still a chance of resisting.