Aspartame causes weight gain, so abstinence-only isn’t a great analogy.

If you are trying to lose weight, then just use less sugar. That’s actually pretty easy, since artificial sweeteners and sugary drinks desensitize you to sweet stuff.

If you taper off for a week or so, you’ll find that the stuff you were previously drinking is cloyingly sweet.

For instance, reading a starbucks menu makes me shudder. I can’t even drink their non-dairy lattes anymore because they are too sweet.