Some guys prefer a woman with a little meat on her bones. I've heard some guys say that Asian women are too thin for their tastes, among other things. I have always had a thing for women who I define as "thick". I haven't come across too many when hobbying that have piqued my interest. There was one in particular who was great, but she's has since moved on.
From what I gather you define being in shape as being lean and probably with some muscle definition. That's fine and to a certain degree you are right. I like that type too. Keep in mind thin and lean is just that, a "type". Some men are known as chubby chasers and if they had a nice chubby lady or provider, you can bet the guy would get upset or stop seeing her if she were to lose too much weight.
As best as I can tell, Asian women do not have the provider market cornered on thin, lean and in shape.