I 100% agree with being oneself but there are some unfortunate human pitfalls which prevents human beings from communicating their true value to others quickly and in an attractive manner. e.g. A guy may be kinda sorta balding, but he might turn out to be the best dad in the world. How is he supposed to convey that value to his potential mates?

This is why I recommend at least paying lip service to notions of fashion and social behavior. One doesn't need to become an outgoing extrovert, only to be able to use the signals that society associates with attractive mates. For males, this is: confidence, good style and posture, hygiene etc.