They can be attracted to whatever they want but that doesnt mean that an average looking guy will be attracted to them.
Even though it seems some of them are trying to force men to find fat and ugly women attractive because not doing it is discrimination and politically incorrect instead of fixing the problem: their looks/weight. Which is pretty retarded considering that you can change your weight, you cant change human nature. The reason most of us dont find fat women attractive is because the primal part of our brain knows that they are not a good prospect for childbearing.