I may not understand what you personally find attractive; that’s true. But look around you at the culture; look at the depictions of beautiful women in art through history. You find the same biologically mediated factors in every society and epoch, signs of youth and fertility: thick hair, large eyes, full lips, a large hip-to-waist ratio, good teeth if possible, and well-developed secondary sex characteristics like breasts. A few individuals and a few cultures have found fat women attractive but they are in the minority. The success of Playboy and the popularity of women who have slender waists + large breasts indicates that most men like this youthful configuration.
No one here ever said they found fat chicks attractive. There is an ideal zone between stick skinny and fat.