Then again, art and technical art (the act of integrating art with code) is time-consuming as well!
These games can have rather complex paths with multiple endings.
In Japan, dating sim characters are referred to as “capturable” -- whether that means you capture their hearts or their bodies depends on the game.
But you’ll need to focus, as playing the field can result in an unsatisfying ending, and no one likes that.
For example, I've produced several visual novels and dating sims.
Some have been quite successful even though I have not played many Japanese games.