
Consult the graph
Your liver is pretty good at taking a beating, but it's a very strange organ. It works fine until it starts to fail and then it's all over. If you have any signs of liver damage, your liver is beginning to fail and it will decline rapidly.
I remember when I was told that I had "mild liver damage" and I took that as "damn, all these years spent drinking and I've only got mild liver damage? Well I can keep doing this"