As a Urologist, I approve this message 
https://www.renalandurologynews.com/news/kidney-stone-odds-lower-among-beer-wine-drinkers/
This article is a little bit unclear to me. It says that “those who drank in excess of 14 g/day of wine but not more than 28 g/day had significant 46% decreased odds of kidney stones compared with less than 1 g/day.”
I assume this is grams of alcohol and not grams of wine, because otherwise this doesn’t make sense, right?
Hopefully someone can confirm my math is correct.
I don’t know what the conversion is for wine, but for water, 750 ml of water is equal to 750 grams. I am guessing that wine is similar, given that it is mostly water. A quick google search seems to confirm this.
Assuming a wine is 14% ABV, then a 750 ml bottle of wine would contain 105 grams of alcohol. 14 grams (low end of range) is 13.333% of a bottle, or 3.4 ounces (100 ml) per day of wine. 28 grams (high end of range) is 26.667% of a bottle, or 6.8 ounces (200 ml) per day of wine.
A 12% ABV wine would range from 3.9 to 7.9 ounces per day.
So basically, the study indicates that one average of one glass of wine per day decreases the odds of kidney stones by 46%. If so, that is great news!
Than I must have over 148% chance of getting kidney stones. (And yes I know my math is incorrect - this is just for fun. Unlike kidney stones which I know from long and frequent experience is anything but.)
I know you were trying to simplify by making the density of water and alcohol the same in order to go straight from abv % to grams of alcohol, but I am pretty sure water is denser than alcohol, so you might be able to push the average daily consumption up a bit to 1.5 glasses at the upper end of the range 
Even better.
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Alcohol’s density is 0.789 g/mL, so a 750 mL bottle of 14% wine has about 83g of alcohol, or a 150 mL glass has about 16.6g
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