“If a man thinks skinny is important, hes not good enough for my daughters, irrespective of what my daughters actually look like.”
“Well proportioned” is a better expression. All men are wired that way just as all women are attracted to certain qualities in men, whether they choose to be or not.
“Achieving a reasonably attractive appearance given what she naturally has to work with.”
A woman’s physical appearance is, indeed, a key quality in attracting men. However, a man who focuses on this quality to excess is demonstrating a shallow character. Note the adverbial phrase, “to excess.” An attractive hairstyle, flattering and appropriate clothes, and a healthy form can reasonably be expected of anyone trying to appeal to a potential spouse.