I understand this too, but it's just a tag, which helps people stay up to date with the game. Sometimes I don't understand when the title is updated, because without that tag, it doesn't appear in the list. And with the huge amount of titles on F95, it's hard to keep track of all the games
But above all, removing it would cause the game to lose potential supporters. Those looking for that particular fetish can subscribe to Subscribestar and help the author decide to release more content of that type and with different new characters.
I still hope he adds a paternal aunt and a maternal aunt with other family member.
I imagine the paternal aunt owning a sort of farm with her husband and a daughter, where the protagonist could eventually help her improve it. Something like the the farm is run down and needs to be renovated. The quest will be of type "bankrupt" and by helping it recover, something will then develop between the two and a relationship start form aunt e nephew
On the maternal side, a completely different situation could then be created. Like having to restore the family home to its former splendor, which had fallen into ruin, know after the protagonist's mother's husband discovered she was having an affair with the MC's father. Here he find out that his mother was locked up in a convent (where the protagonist will have to deal with the mother's possible husband. Who may have taken another wife as a bride, given the embarrassment received from the possible previous wife). And open up to a possible rescue of her to start a love relationship also with his mother.
There are so many possibilities and new characters to add, like cousins and grandmothers (as side missions)