Where is Hollywood telling men that being nice is sexually attractive like this post or this post claims?

In romantic movies, the woman will usually pursue the nice guy for relationships, but in most romances the guy is also fit and handsome. In G rated romances, she will fall in love at first sight, not with his niceness but with his charming looks. The niceness is only an additional thing. In R rated romance movies, the woman starts off having casual sex with cads and fuccbois. She doesn't notice the nice guy at first, until she realizes that she doesn't want to keep having casual sex with fuccbois and then pursues the nice guy for a relationship. In fact most rom coms are quite red pilled if you think about it that way.

A lot of men on PPD are complaining that men were taught that being nice will get them casual sex, especially in romance movies. Some redpillers are saying "I'm nice like Hollywood tells us to be. Instead of getting a lot of casual sex like nice guys in Hollywood do, why am I a beta bux?" while Hollywood is basically saying that being nice is the beta bux. (I also don't agree with redpill that being the guy a woman marries after she's slept around is a bad thing or that it leads to dead bedrooms either, but thats another discussion for another day.) What romance movie shows that being nice will get casual sex?

I'M TALKING ABOUT CASUAL SEX AND SMV HERE, NOT RELATIONSHIPS AND RMV. ACTUALLY READ MY OP. NICENESS IS A + TO THE RMV. BUT NOBODY SAYS THAT IT'S A + TO SMV.]

edit: A lot of people mentioned that in the movies, physically unattractive guys can get much more attractive women by being nice. Note that those guys often also have other traits like kindness (true kindness, for example actually being there when she needs him, not just buying her presents she doesn't want and then calling himself nice), charm, humor and a cool personality. Also, for the guys who say "we never knew women were so shallow, I was told just being nice will get us a hot girl," if you think it's so unfair that no matter how nice you are women won't like you if you're not hot and that women are shallow, why don't you try to chase a less attractive nice chick rather than always Stacy?

latest Edit: a lot of people here said that a lot of nice guys want relationships only. Being nice does help that though. At least it helps him weed out the women who aren't relationship minded. I don't think it's a lie that being nice helps someone get a relationship or LTR.