Good looks CAN be the confluence of good genes and adequate nutrition in development.
But plenty of ugly people live long and healthy lives.
And plenty of good looking people are as dumb as a post.
We tend, biologically, to be attracted to people who are significantly different from us... not so much in looks, but in chemistry.
People too often hook up with people of different tissue type or blood type to be accounted for by chance...
This fact of chemistry in attraction is probably an evolved insurance that we mix our genes up... don't mate with folks too closely related....
But almost no one is the perfect package. beautiful, and smart and funny, and ambitious and healthy....
Pick the things that you can be happy with...
Eventuially, Looks desert us all.