Nice guys do not finish last, unattractive guys (and girls) finish last
Despite Hollywood's best efforts to somehow separate the way genders are wired, both males and females will fuck a physically attractive person, despite their deficiencies in personality. Most males would fuck Kim Kardashian no matter how stupid or annoying she gets, this is accepted that males will fuck a empty headed idiot. We dont make any excuses here like "men only love stupid females" we know why men want to fuck these women, they are phsyically attractive. the end. Its that simple.
But why is it not accepted that many females would do the same and fuck a male whose main attribute is that he is physically attractive? Why is this a "bad thing"? Ryan Gosling can be a total douchebag all he wants and will still be able to land tons of women. That does not in fact mean "women love assholes", it means "women will tolerate to a extent his assholeness because of his physically attractiveness". Just like men will accept any bullshit Hilton, Kardashian or whoever else displays. Not because males love empty headed idiots, but they will accept it just to fuck them. There is no difference here, so why act like there should be?
The shit 90s sit coms, Hollywood and Disney have taught you is complete crock, females are not wired any differently than males are, they do not in fact only judge males based on their personality. Your life is not Beauty and the Beast
No reason to chastise anyone because of this, its how we are wired. The more physically attractive you are, the more rope you have to play with and more you can get away with. "Nice Guys" seems like a defensive mechanism to institute that something is wrong with women, when in fact nothing is wrong with them at all. They are acting based on their instincts which are far more similar to male instincts than you are led to believe.
TLDR:
When men want to fuck attractive women, its okay, thats how men are. Big titties and asses is all that is needed
When women want to fuck attractive men, its not okay, its not how they are suppose to be. They must like assholes/something is wrong with them