No, you're misinterpreting it, maybe even projecting your own insecurities. Nobody said you have to date fit / thin people - just that people shouldn't lie / pretend about it. You have a fetish on fatties? Set the weight filter up high. This is clearly superior to the current model, where it's easy for people to lie about weight/age/height/income/...

The real criticism of this model is completely different, and much deeper. People don't actually know what they want and who would make them happy, and they often conform / default to social conventions in their public preferences - e.g. maybe you want to filter out 10+ older men because you don't want to go on dates with "creepy" dudes, or you want to filter out fat women because you don't want your friends to judge you - even though in reality, you might actually be happier with those matches, or, more likely, those attributes are often orthogonal to your actual happiness.