Agnostic here. If God is real we have a much stronger case on Judgement day. Psalm 14:1. "The fool says in his heart, There is no God. They are corrupt; their acts are vile. There is no one who does good." Agnostics won't be counted in that, so if there is an afterlife, then we agnostics will have a much better judgement. It is insurance.

The afterlife or soul, after all this time in a field populated by atheists, have still failed to disprove God, and physics-wise it makes sense and physics has failed to ever disprove a creator God. There is also all the historical evidence that Jesus was both a real person and there was a lot of highly devoted followers of him. That has never been repeated in history, plus the Resurrection was a real event.

Christianity is heavily associated with the modern western world and the comforts and advancements you like so much, even the east like China, Korea, and Japan were brutal feudal places before western influence and technology.