system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] Why bother striving for immortality when there is demonstrable proof of an afterlife?

What's the point in horcruxes and philosopher's stones when we have ghosts that can tell stories of being offered the choice of passing on or staying behind, artifacts and creatures that give anecdotal evidence of death being more than a mere end, and solid evidence of the existence of the soul?
gpt
For one thing, you can stay to help people who are in this life. They removed the dementors from Azkaban, so that low-hanging fruit is taken, but there's lots of other problems that need fixing. And you might have living loved ones you want to stay with.

If you don't care about other people you might want to stay out of fear for what's in the next life. A lot of people believe that we'll be punished for our wrongdoings, which in some cases is quite a bit. And there's lots of religions that claim random things are sins. Maybe we'll be punished for things that aren't even bad. Or we might get reincarnated as animals or something else terrible.

Granted, you do have the opportunity to stay in this life as a ghost. But there's problems with that. It's inconvenient not having a body and not being able to use magic. And there's lots of prejudice against ghosts. And for all we know, not everyone gets offered that choice, since anyone who wasn't wouldn't have come back. We do know for a fact that muggles aren't offered it.