My DP sounds similar to yours OP, we've both always preferred spirits (he's actually allergic to wine, and though we both like beer, find it very bloating)
He will get through 1-2 bottles of rum or whisky in a week, with a few (500ml) cans on top. He will have a drink at home 3-5 evenings a week, though no major difference between weekend and weekday.
I have noticed with our friends that it seems to go to either extreme; when people stop going out as much, either the drinking tails off naturally, or they get into drinks as a hobby (eg premiums drinks, fancy wines, cocktails) at home - and then if there is always alcohol in the house it can creep up rapidly.
My DP im sure has some awareness of health risks for the future, but right now he's annoyingly fit and active, his hangovers are mild or non existent. Fortunately he works from home and doesn't need to drive.
I have cut down and I'm hoping that it might encourage him to at some point but given he really doesn't see any downsides I can't see much changing, unless he gets bored of it. It does worry me though.