It really has very little to do with men "being owed sex" by women. Most men don't really believe they're owed sex by women, or anyone for that matter. The big issue is that society has placed such an emphasis on premarital sex and random hookups and casual sex that young men are beginning to feel like if they aren't having sex they are missing out on an integral part of life, which is not the case.
Sure, there are definitely men out there who truly believe that women are simply there to please them and be their slaves, but that is not the case for the vast majority of men, even so-called incels. They have simply been led to believe that sex is an amazing, huge part of life, that it is integral to a normal life and, while it is important to a healthy relationship, it's not necessary to live a normal life.
It also comes back, in a way, to the destruction of traditional masculinity. If they can convince millions of men that sex is the only thing that matters, that it is the most important part of a relationship and of life, then that's all they're going to care about. They're not going to focus on other things such as learning new skills or trade or bettering themselves in some other way.
Of course, the funny part of all this is that by convincing men that sex is the only thing that matters, they are completely reducing women to only being important in a sexual way. Although, I suppose that's part of the plan too. After all, we can't have women being motherly figures or caring individuals in a household or in life in general. We have to have them choose careers that debase them and destroy their mental well-being. It really is all connected I guess. The destruction of the family unit, the destruction of traditional masculinity, the destruction of traditional femininity, the sexualization of children... It really does circle back to the destruction of traditional values in a way that lets them swoop in and replace traditional morality with some sort of perverted new age "progressive" morality.
Anyway, that's my $0.02
I think the "nice guy" grew out of a surface-level observation the mess that dating culture had turned into and trying to make sense of it all.
"Why is she going out with that violent criminal? I'm a nice guy. He just makes her cry and I would treat her well."
What the surface-level observation won't tell you is that pornography -- which is now celebrating it's victory for over 30 years from any kind of restraint from exposure to children and has used the opportunity to drop the facade and transition from nude pinups into completely depraved hedonistic hardcore explicitness -- teaches young girls that the bad boys are exciting, they'll give her what her body craves, and that emotions don't matter in coupling.
She's not skipping over the nice guy because the nice guy is a bad mate, she's skipping over the nice guy because she's been sold a lie that the destructive one is better.
This is akin to fast food. Kids will never ask their parents for real, traditional and nutritious food. They'll ask for what was advertised to them, so juiced up in processing and unnatural flavors that the real thing doesn't stand a chance.
Oh, and, before this is treated as some anti-woman whatever, in all of this, the PUA guys who take advantage of this to get their dicks wet also bare responsibility. An explicitly sexualized society may have cracked open the shells, but these guys are using these cracks to rip open the whole thing. Destroying other people for your 15 seconds of bliss is peak evil.
This is retarded. Women aren’t attracted to bad boys because porn told them to be attracted to bad boys. Women are attracted to bad boys because they signal tons of fitness traits in the forms of targeted violence and alpha behavior. These things are happening in a woman’s lizard brain, so she isn’t making any conscious decision. She’s just getting wet for sociopaths because that’s how lots of women are wired.