Goldfinch, perhaps you are thinking about how tough maintaining your weight loss is going to be. With all of the negativity around about how hard it is to live a healthy lifestyle, sometimes we feel like we are the only ones with this goal.
As for your other concern, while losing weight does help with the health issues you talked about, it is not a cure. My DH takes bp medication, has 2 stents, and also takes 2 cholesterol lowering drugs, and a blood thinner. He rides 2-3K miles a year and is thin. He looks like a very fit, healthy person. Genetics plays a large part in this. Perhaps you should look at it from the point of view that if you hadn't lost the weight, these conditions would be worse.