The same could be said even for interventions like "don't eat surplus calories" and "life weights". Once you stop, you don't get the benefits and you'll regress.

"But you have to do it forever" shouldn't be a convincing dismissal after 10 seconds of thought.

By completely changing your lifestyle and retuning your habits your health isn't hinging on one single point of failure (a drug you need to take).

If I stop going to the gym for a couple of months, I'm probably not going to gain any weight because I still eat healthy and stay active.