There is truth in the OP, but it's only one element of the truth. Insomuch as physical beauty is only one element of human attraction.
I've banged 9's and 10's but got bored quickly because the compatibility wasn't there. This is particularly true for women because their arousal is much more dependent upon how a guy makes them feel, opposed to just how he looks.
This is significant to how guys, especially in fora such as this, get themselves blinkered by one element of female attraction.
Looks, muscularity, financial solvency, charisma, personality, status, creativity, rationality, intellect. These are only some elements of attraction. The more elements we maximise, the more attractive we become. Relying on one element is absolutely a fool's errand; as is not maximising all elements.
Looks only get you so far in life. Take that from the voice of experience.