ericcha
Many devs will add themes which have proven successful in the past and which players will amost certainly like. I totally get your feeling, but in the end these games are still meant to be "porn games" which cater to what those who play them like. And while I'd totally agree that there are many devs out there who can't write (which is expected, given that most of them start because they can create 2d/3d art etc. and not because they are good writers) these games still aren't supposed to be in some kind of slice of life genere where people's every day lifes are what's it really about. There are many users out here who do hardly care about the story beyond some kind of baseline scenario and as such the number of people who really, really, really care about perfect and realistic stories is probably quite small.
And else? These games are always restricted by development time, the need for updates to include some kind of NSFW content (unless the game does't promise that) etc. and more normal "realistic" relationships/behaviours are pretty hard to fit into that. You'd usually go from quite a substancial time of "nothing happening" to basically everything, which isn't easy to do in patreon development, because many people just won't pay for that. There are some exceptions, though, and I'd even say that this game here does it quite well, too, because of the prolonged release schedule.
I'd certainly be happy to get better stories in general, but I don't really see that happening.