The science is simple according to Shapefit:
[P]ure alcohol contains about 7 calories per gram, which makes it nearly twice as fattening as carbohydrates or protein (both contain about 4 calories per gram) and only just under the caloric value for fat (9 calories per gram). This means that if you want to lose weight and reduce excess body fat, alcohol is not a good choice.
Too much booze also softens our inhibitions so we eat foods we would normally shun. This doesn’t mean that you can’t ever drink but when you do, keep it to one or two drinks.