It's a joke. A confident ugly guy is seen as a tryhard or rapist.
A Brody Jenner, Channing Tatum or Jake Gyllenhaal lookalike who's introverted would be seen as "mysterious"
A guy who looks ugly will always be viewed by girls as a creep. Girls' repulsion towards guys who are victims of balding/pale/rosacea/acne is a natural instinct to keep the gene pool cleaner.
Personally, I blame science for not giving us more control over what we look like. Bone structure/hairline/skin tone.. we should be able to choose everything