in the same group you'll find solar radiation (yes, literally the Sun light), UVs (A,B and C), X-ray and many other substances and/or radiations we are exposed to on a daily basis.
I've known people who died from skin cancer and who died from late term alcoholism with pancreatic cancer. I guess dosage matters, even though the effect would be daily available.
A lot of people that die of cancer never drank a sip of alcohol or smoked a cigarette.
Alcohol increases the risk factor, but it's not like tobacco, alcohol is correlated to an increase of breast cancer and oral cavity cancer at maximum 20-25% more. 20-25% means 1.2-1.25 times, tobacco increases the risk 2,000-2,500% which means 20-25 times.
If you look at the stats in my country for oral cavity tumor, men risk (of getting it, survival rate after 5 years is over 60%) is 6 / 100,000, women risk is at 2.2/100,000. So a woman drinking heavily will see her risk go up to 2.75, which is still half the risk of men.
That's the kind of risk we are talking about here.
In perspective, if it was about tobacco the risk would go up from 2.2 to 55. A bit different, isn't it?
People react to these headlines in the wrong way: they confuse "risk increases" with "certain death". It's not like that, still a lot of cancer patients had a completely normal almost risk free life and we don't know why they got it, the only thing for sure is that it ran into their families. That's the biggest risk of them all.
And do not forget that age is a big risk factor too, one of the biggest.
Back to oral cavity cancer: in my Country average age of the diagnosis is 64, 95% of them are diagnosed after the age of 40.
https://en.m.wikipedia.org/wiki/IARC_group_1_Carcinogens