That is a calorie if the alcohol is burned in a flame. An alcohol calorie isnt a carb calorie.

https://drinks.seriouseats.com/2013/10/cocktail-science-do-a...

https://www.quora.com/Do-calories-in-alcohol-really-exist-If...

I cant find an exact answer, but combining the ideas that: the metabolic pathways for ethanol take precedence over the metabolism of other food components, leading to fat conversion and storage of higher-kcal foods than would be expected if the energy for metabolism was not diverted to the alcohol; the extra energy needed to metabolize alcohol should become a net drain on energy reserves; and alcohol is almost never fully metabolized, but rather excreted as acetic acid - I think it is safe to assume that an ethanol calorie actually provides the body very little energy AND if youre not eating while you are drinking there isnt a way for the body to store the energy as fat for later.

If you add up the average consumption of alcohol for an American in a year, the difference between 100 calories per unit and 145 calories per unit amounts to something like an additional 45-60 minutes of exercise per week to offset. There’s a lot of variables there, so it could potentially be more or less, but it’s non-trivial.

Being low carb is appealing to a lot of people.

To be fair Old Chub is north of 8% abv I do believe.