Earlier quoted context omitted.
They're not trying to ruin your fun. Alcohol increases the risk of cancer: https://www.cdc.gov/cancer/alcohol/
So does the sun: https://www.cdc.gov/cancer/skin/basic_info/sun-safety.htm But the sun, like alcohol, isn't so bad in moderation
Sun: can I live forever in a cave so I don't get any sunlight? No, you can't (in practical terms). But you can use sunscreen and you can limit the number of hours you get exposed to sun (don't be a dick and lay down on the beach 5h straight during hot summer days). Problem fixed.
Alcohol: can I live forever without drinking any alcohol. Yes, you can. Problem fixed.