system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] Is the Blip proof there is no afterlife?

None of the Vanished have any memory of the years between The Snap and their reappearance. Since they were killed and resurrected this would seem to imply that either death is the end and only oblivion awaits, or that none of Earth’s religions actually worship matter.
gpt
We know for a fact that the soul is real: Doctor Strange and his kind are able to separate their souls from their bodies, and the very existence of a Soul Stone indicates that the soul is a fundamental aspect of the universe.

The Ghost Rider is also canon in the MCU, by way of *Agents of SHIELD*, and that opens up a whole can of theological worms, but his Penance Stare targets the soul.

We've also seen people interact with the dead; T'Challa meeting with the former Kings of Wakanda, for example.

It's possible that T'Challa's meeting with T'Chaka was a hallucination, but all of this together suggests that the afterlife is real in the MCU.