>>36229708There really is no such thing as an adult theme. It's a concept money hungry and religion obsessed fucks have made up so mental children feel grown up (a thing only children obsess over being) for flocking to their tripe.
Adult themes is just dark and edgy for the sake of it and doing anything for it's own sake is always retardation, be it change or edge.
You can do deeper dives into human existence in a story without doing "adult themes". In fact it's completely possible to do it without even changing the rating of the game if the ones writing and animating etc. it is competent enough.