Both my mother's trusted internist in the early 200's and my primary physician have said not to be worried about a little extra weight if you are otherwise fit and eat a healthy diet. That unexpected illnesses, injuries and surgeries can change things in a heartbeat, and those fat stores are protection for your bones and organs.
This certainly was true in my mother's final years. She was always what I called middle-sized - muscular and slightly padded. By her final year, after a number of illnesses and strokes, she was frail and much smaller.
I stressed a bit over weight when I was in my early 60's, then I had 4 major surgeries in less than one year, and lost all of the "extra" weight plus some more due to complications. I would have been a skeleton if I started at my "ideal" weight. Five years after that, having regained my former weight, I got a severe long-term lung infection and lost 20% of my body weight - since I started at 125#, you can imagine how gaunt I was.
So there is truth behind this - and you can probably observe examples among your family and friends. The only caution I have is, too much weight stresses bones, joints, muscles, heart and lungs, so there is a fine line to walk, especially if you have a family or personal history of hypertension, heart disease or stroke.