On the contrary, it may force them to make the products healthier. I've heard many GLP-1 users reporting an aversion to processed foods and cravings for healthy food.
I was thinking exactly this. People consume processed foods because they highjack our evolutionary responses. If GLP1 agonists make people immune to those high fat, big carb diets, perhaps we would see a decline of these strategies and instead seeing companies compete for the low appetite of people through smaller quantity yet high quality foods, rather than fast large quantity food.
This feels overly optimistic. You want to optimize for existing foods that are still high fat big carb and don't have the quality qualifier. I'm not familiar with the biological pathways that GLP1 operates on but I'm sure food companies will be working on adversarial products
Eating healthier for a while itself will reduce your palette for these foods, and make normal food taste better.
If you limit your sugar intake for a bit, American bread becomes quite the tasty treat.
It might not be direct action of the medication, but the medication making it easier to fix your habits can have huge dividends, similar to how giving an ADHD person stimulant meds make them less likely to die from misadventure or substance use because they self medicate less.