> Why would you want to continue using a drug for the rest of your life?

It's better than being obese. This is true of most drugs for chronic conditions. very few of them are curative, almost all of them treat the condition.

> Longterm glp-1 agonist research doesn't agree with this.

Sorry I wasn't clear, I meant with continued treatment you don't rebound.

> Yes, a pill for this, a pill for that... and there's no chance we'll discover these drugs have negative effects when used by a person for 50 years.

They might have negative side effects but obesity has very large negative side effects. I would be incredibly surprised if any of these drugs that have been used in diabetes treatment for a long time have anywhere close to the negative side effects of obesity.