That's because it doesn't. For the kind of light social/dinner drinking most people do, there is absolutely no evidence whatsoever that it increases your cancer risk (on the contrary, there is some evidence of protective benefits, but epidemiological studies on diet are always full of confounders, so who knows). The reason it appears on lists like these is that alcohol abuse is quite common and leads to liver cancer, among other things, and is associated with other unhealthy choices.