The obesity issue is definitely a hot potato and for people who never struggled with it, it seems simple to address, eat right and exercise. I have been overweight almost my entire life. When young, there were periods where I got down but had a hard time maintaining it. As I hit my 50's it was such an incredible struggle and I actually blew out a knee from exercise at one point.
In the summer I got deathly sick. With a high fever, they thought I had Covid, but tested negative. I ended up in the hospital a few days as I was so very sick. Running tests, they found I had inflamed organs, an irregular heartbeat, and blood platelets had dropped to 42,000. They determined I had some type of viral infection. I was seeing multiple specialists for a month or two until everything came back to normal levels.
The weird thing, is after I was sick, I started dropping weight like crazy. With no effort. It was bizarre. It kept going and going. I lost about 45 lbs in less than 5 months. I actually had to start eating more. That illness somehow affected my metabolism as well. It was one good thing that came from that time and if someone could figure out how that happened, they could make a fortune!
I know this is a Covid thread but people who have never had an issue with weight think it's just a matter of eat right and exercise. And yes, that is so very important, but, there are other factors involved that can have far greater impact then you would imagine.