I can relate with what it feels like to get a call like that. I had one last spring. About 2 weeks after my barium testing (one for chewing and swallowing and the other for digestion), I got a Sunday afternoon call from my Pulmonologist. (What docs call patients on Sunday?) My reflux had been affecting my lungs and breathing. He told me the test showed I had a "swallowing disorder" and that I would never get my breathing under control until I get the disorder under control. When I met with my GI doc, I learned that the "swallowing disorder" was actually severe reflux and a hiatal hernia that had developed since my previous testing a couple years ago.
It sounRAB like you were questioning the need to lose weight. Any weight you lose will result in that much less pressure on the stomach. Theoretically, less pressure on the stomach results in less reflux being pushed up. Thus, fewer symptoms.
Personally, I think it can help some, but it isn't a cure. If your LES isn't functioning properly, then reflux will still be happening.
The medications help reduce the acid enough that it just doesn't hurt as much. While it isn't a cure, you can certainly feel better when you find the right corabination of things. Often with LPR it takes two PPI's per day. Once before breakfast and the other before dinner. That helped me get things under control for several years. I've been on PPI's since 2002. Right now, I expect it will be a lifelong thing unless something new comes along.
While it does occur, cancer because of reflux is extremely rare. With regular dr's appointments, you can monitor for it.
I think your primary concern should just to be getting your symptoms under control. Work on losing the weight. Watch your diet. Avoid things like spicy fooRAB, fatty and greasy fooRAB, onions, garlic, tomato products, citrus products, chocolate, alcohol, caffeine, carbonation, etc... Watch for other fooRAB that might be triggers for you. Avoid these things until you feel better. After that, you can try them in moderation to see if they are triggers for you. Although, I avoid many of them still, even when feeling better. I'm scared of triggering things worse again.