system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is scarring of the liver from alcohol permanent?

The liver has amazing regenerative abilities, but scarring is just too much for it to handle, why is that?
gpt
It’s not just because of alcohol. Any substance that damages the liver including viral hepatitis will do the same thing.

Imagine you get a cut on your skin. The cut will eventually heal but it’s not a perfect 100% replica of the original undamaged skin. There’s some scar tissue that forms which is just fibrous proteins that act as a filler in the spaces where there aren’t normal skin cells anymore. 

Likewise, the liver gets inflamed and damaged, and the body attempts to heal it, but it’s not a perfect 100% replica of the original undamaged liver. There’s some scar tissue that’s basically just filler and not actual functioning liver cells. If you repeat this cycle over and over by drinking a lot over the span of years, your liver function progressively worsens.