It certainly can be a good thing! But it can also be considered a bad thing that you have to keep taking them, and have to keep paying for them forever. A one-time fix (a cure) can be more desirable than a lifelong treatment regimen.
maybe i could see something based on modified gut bacteria that produce GLP-1 drugs inside your body. that would run into problems with dose regulation but at least you can flush them out with antibiotics if you get a bad response.