Exactly.
Thirty years ago, my dad told me that I was "getting a little piggish looking." Not nice, but true. Right then and there I stopped partying, going out to happy hour and eating fast food. I ate no red meat for 2 years and upped my fruit/veggie intake. I also started walking and doing calisthenics. I lost 25 pounds, even if it took me a year. I have never gained it back, except during pregnancy (each time it took me 4 months to lose the pregnancy weight) and the one time it started to come back is when I started cycling. My type of exercise may have changed, but even though I could not have done this without good nutrition, I most certainly could not have done it without exercise. I would have had to starve myself and I would have been one of those "skinny" girls with high body fat and no endurance.
I hope my friend who recently went to a trainer to "get rid of her bat wings" doesn't see this. She told me that she told the trainer she only wanted to work the one muscle that she thought was flabby (after the woman tried to explain about opposing muscle groups) and that she didn't "want to get muscles." I am tired of people telling me they can't do what I do. OK, but they can do something.