That’s true. He died of pancreatic cancer. Heavy alcohol use can lead to conditions such as chronic pancreatitis, which is known to increase pancreatic cancer risk. The largest associated cause of pancreatic cancer is food that is cooked until charred or blackened, which you won’t find much of at McDonald’s.
With that being said, don’t eat at McDonald’s. It’s terribly malnutritious, laden with chemical treatments, and sourced by forced prison slave labor.