[dragonwriter]

> Fitness is related to, but not the same as, attractiveness.

Sure, and if you have free reign to choose on any traits you want, you'd probably not consider attractiveness directly, but instead consider a balance of general health, physical fitness, survival experience (and specific context if the expected survival situation was known in more detail), and general intelligence (though the latter wouldn't necessarily be very high on the list of priorities.)

If all you have is intelligence and attractiveness, though, given that attractiveness has a correlation with (even though it isn't identical to) important things other than general intelligence that the hypothetical has prevented you from considering directly, you'd be ill advised to neglect it in favor of intelligence alone.

In fact, the whole reason attractiveness evolved is is exactly about choosing who to be stuck in a long-term survival situation with (which is why it is linked to both general health and physical fitness.)