I believe talent finds the path to success, not historical archetypes, but who declares the winners? Generally the champions of the prior generation, which is one of the reasons why stereotypes are so powerful and hard to shake.
Who knows how many Little League squads the good-looking kids make, because of the subconscious impression factor ...
How much extra coaching... how many times they were given the benefit of the doubt ...
Don't think anybody's whining. But there may be some objective reality behind the idea that MLB players are better-looking than the general population...
And some reality behind the idea that if you're good-looking, then the confidence, the sense of belonging, gets you over some humps you might not otherwise have crossed...