I think someone explained this a few years ago. That a lot of authors are forced to add sex scenes within the first 5 chapters or their work won't get published. There was an author that complained about it on twitter saying even though they want to release interesting stories it won't get chosen by their publisher. These publishing companies want what's selling and sadly it's what we are getting these days

another manhwa that starts off with sex that's an immediate turn off why do the authors need to be so lazy + the ml is just so insufferable hard pass