I also have a friend who is very ill because of skin cancer. Shall we all never go out in the sun?
Well, the last time I checked, going out in the sun isn't exactly avoidable - which is why most people cover up, use sunscreen and stick to the shade during the hottest parts of the day. Going out in the daylight is also fairly essential for bone health and Vitamin D.
Alcohol, on the other hand, is totally avoidable and while you can argue that it has some health benefits, there are plenty of other ways to improve heart health etc. that don't involve drinking.
Don't get me wrong, I totally get why people drink - it tastes nice, it's relaxing, it makes you feel good - but I do find it amusing that so many people (on here and IRL) choose to totally ignore the negative sides because they enjoy it and "only have a few bottles of wine a week so it's no big deal".
Without meaning to sound like my dad (doctor with alcoholic parents) a lot of people don't experience any negative symptoms or side effects from their poor lifestyles until it's too late to do anything about it.
I can't help thinking of a relative of mine who was diabetic and did absolutely nothing about it because he "felt fine" - he ended up with numb feet, infections and heart failure and spent the last decade or so of his life stuck rotting on the sofa because he couldn't walk or do anything for himself. On his deathbed all he could talk about was how he wishes he'd done things differently and had taken his health more seriously.