There are many other potential body shapes that are healthy and fit. The point is that for most people, the idealized, photoshopped shapes in these ads are actually literally unobtainable. Only a very small percentage of the population can ever achieve these shapes, for a very few years of their lives, and under very specific conditions. And when your media is saturated with only those images of impossible bodies, and the implication that this is the ideal that everyone should meet, even though that’s impossible, then it becomes a problem.