There's a market for everything and everyone. Most of us don't possess all the qualities considered attractive by societal expectation yet we do okay.
But let's assume that there are norms for beauty. If those norms appear to support good health and longevity, should they be considered "wrong"?
If it's a "norm" for most people to like chocolate ice cream because it's a general taste preference in the DNA of humans, is that wrong? It doesn't stop others from shopping for vanilla ice cream.
Anecdotal evidence proves that being overweight for a variety of reasons; may lead to health complications, diseases etc. But that wasn't my point.
I challenge you, perhaps to pick a different angle that I could agree with (because I know of MANY MANY unhealthy women who are skinny, as do you). However they are considered attractive based on societal norms. Most men are not necessarily attracted to a woman who is barbie, with enhancements because she looks healthy- so your attempt at creating right or wrong comparison failed, epically.
Beauty, in the form of sexual desire, or carnal pleasure from the time of existence has really come down to reproduction and mating. On that basis, AND I LOOKED THIS UP RECENTLY, men tend to gravitate towards women who are symmetrical, spacing of eyes, lips, breasts...which are youthful. (YES, youthful) and it is deep rooted in being an attractive mate for child bearing.
Which, any woman without any reproductive issues can usually have a child, on a theoretical standpoint- regardless of weight. So, even then- that basis is flawed.
We as a society have created unproportionally ridiculous standards for women to adhere to, and define what beauty in attractiveness is.
Using your example of ice cream flavors, would be better suited to different sexual partners- as non monogamous beings, variety is often sought.
In the same regard of bbw status, as a mature woman with what I consider attractive features and feminine curves.... I fall into this category because I am also NOT within the societal norm of what is considered attractive, even though I am healthy looking and beautiful.
So, on that point- I shall reaffirm that it isn't wrong to like something outside of the norm, as there are plenty of examples besides being BBW that isn't the "norm" but that I don't feel its acceptable to project that if you aren't the norm, you aren't attractive or that others wouldn't find you appealing. There's a difference...