I have news for you kiddo. Everything you eat, drink and breathe is bad for you. Tap water is full of metals, hormones, herbicides and chloramines. Fruit is covered in pesticides, fish is full of mercury, most packaged food/drink has BPA in it, most rice contains arsenic, everything has too much sugar in it and over time, your body accumulates so many toxins and heavy metals from just breathing and living in urban environments that most human carcasses would be refused entry to a landfill site on the grounds they're toxic waste.
Oh, and if you're lucky enough to be American, your food includes so much mould, insects and excrement, the US government literally
mandates how much exactly is allowed before action needs to be taken.
In short, alcohol in moderation isn't really going to do much harm to anyone in the long run. If it makes you feel any better, Earth is due for its own Calamity in the next few years so I really wouldn't worry about minor vices now.