Because it’s sneaky. You think all fizzy water is the same? Nope. One will make your blood sugar spike; the other is basically water. One pairs with gin; the other pairs with everything.
Next time you’re at a bar, order a seltzer with lime. You’ll look like a health guru. Order a tonic with lime? People will assume you’re about to chase it with a shot of gin. Perception is everything.
And honestly? Most people can’t tell the difference in a blind taste test. They just know something tastes “different.” Now you have the power to explain why. You’re welcome.