People always say that drowning a salad with dressing defeats the purpose of eating a salad. I find that to be incorrect. Sure, a nice, flavorful dressing is high in calories and fat but it is what makes a salad edible in the first place.
The purpose of eating is to nourish your body with the essential nutrients it needs to be healthy. Those nutrients are still there in the salad under the dressing therefore you are still getting them. The high calorie dressing just facilitates the chance of actually consuming them.
If you are not enjoying your salad then what is the point?