Oh that's not true at all. First I think they taste better, they're sweet without being syrup-y. Second it allows me to drink a lot of soda, 5+ cans a day adds up when it has calories. I have no expectation that it helps me lose weight, it's just tastier water.

It's funny that folks will look down on diet soda but then be fine with tea and coffee and sports drinks like the bubbles make it meaningfully different.