I also advocate a world without women for men.
Not sure about South Korea, but in the USA, there's no benefit for a man to marry a woman, either. I've long advocated for men not to get married. The number of friends I've had go to absolute poverty because of a divorce is incredible. Living in their cars, lose their kids except for 4 days a month (every other weekend).
But in the world without men, they women should probably move to an uninhabited land and start their own cities, put in pipelines, sewers, open auto repair shops, start construction companies, create and pave roads, build homes and highrise buildings, electricians - all that stuff that men traditionally do for women. Only 2-4% of all construction tradespeople are women in the USA, not counting women in admin or management - only counting the actual trades workers. If women are going to do this, they shouldn't depend on the infrastructure that men created, and should be 100% in their world without men. Seems fair to me. If women are going to live without men, then commit to it. And the same with men. Men will have to do without having 284 pillows on their bed, hearing about how their friend's brother's sister's boyfriend's boss' mother re-decorated their house. It's a steep price, but I think men can do make it without women. And women without men. For one generation, anyways. Then if we do it worldwide, the Earth can do a reset and go back to where it was before humans messed it up. So it all works out perfectly. Put a bow on it.
However, I've read artificial uteruses https://imgur.com/lrwGAvv are right around the corner (hello Matrix), and so men can then buy an egg from a woman egg donor, do an artificial insemination, and grow the child in the artificial womb. That way, a man can have a baby but not be in jeapordy of losing the child or any assets like they would if they get married and then divorced. For companionship, maybe with these new robots, that will bring new companionship to the next level.