@TheGodEmperor Isekai is popular because people got fed up with the harsh realities of real word situation, dissatisfied with their unpleasant current life, so isekai genre serves as a form of escapism. In fantasy genre, people mostly write their desire, what's not commonly exist in real life. So, maybe in Korean family, a father is/was less likely involved in raising their children, because of various reasons. That's why it's sort of a 'fantasy' to have a very loving and affectionate father. That's why maybe a lot of manhwa recently did that.
FYI, in the past few years, Korean people starts to raise more awareness about the importance of father in parenting. There is an extremely popular reality show, showing how the father does housework and taking care of the children alone when Mom is sent away. It's called Return of Superman.
Summary from Wikipedia: Celebrity dads are left to care for their kids alone for 48 hours without the help of anyone else, while their wives leave home to enjoy some relaxing time off. The wives are shown leaving the home before the 48 hours begins and coming back to greet their family once the 48 hours have ended. During the 48 hours the dads and children are either doing a task the wives have written out for the dads to complete, or the dads are exploring new activities with their kids. Occasionally celebrity friends of the dads will stop by to interact with the kids.
See how this is so popular. Aside from the cute kids, having dads taking care of their children and doing some chores is apparently not as common as we think. Some dads are clumsy coz they never involved that much with parenting before the show, some dads are really excellent that can serves as role models.