That makes sense, as orientation and race one are born with and we are also not born to be bias against them but nurtured. Where is weight (which we are certainly nurtured with every marketing element we see) its also nature and evolution to in general be attracted or find pleasing healthy people since that results in healthier communities and off spring in general. The same goes for the others they mentioned such as disability. So while the nurture part could certainly change our genetic bias towards healthy people most likely will not. Hopefully the nurture part will since people are bias against people who are healthy but not peak perfection healthy.