While it is doing some harm, it is also doing some good:
"
- Regular coffee drinkers were 80 percent less likely to develop Parkinson's disease.
- Two cups a day reduced subjects' risk for colon cancer by 20 percent.
- Two cups a day caused an 80 percent drop in the odds of developing cirrhosis.
- Two cups a day cut the risk of developing gallstones in half.
Studies have also suggested that caffeine is beneficial in treating asthma, stopping headaches, boosting mood and even preventing cavities
"
Source: https://science.howstuffworks.com/caffeine6.htm