If diet coke has 0 calories and satisfies my cravings why cant I drink 3-5 cans a day and be healthy

The aspartame thing has been debunked. I know it can have some effects on your teeth (erosion) but that aside, assuming I have good oral hygiene, can I consume 3-5 cans of diet coke a day and stay healthy? It's a zero calorie snack and keeps me full. (Trying to loose weight)