Reasons I think there should be more fanfics where Marinette renounces the Ladybug Miraculous:
Very small
Heart-Too-Big Disease(Terminal)
Very eepy
Someone get this girl some anti-depressants I'MFUCKINGBEGGI-
No Heroing = More time to bake & sew
Marinette's love language is gift-giving so she can make things for all her friends
friends are in less danger
Chat Noir can know her identity
Chat Noir can give his princess forehead kisses while on duty
She can hide with her friends and comfort each other during akuma attacks
Ladybug Alya/Kagami/Nino/Luka
New Ladybug can give civilian Marinette forehead kisses as well
She can be Multimouse sometimes(as a treat)
Maybe Akumatized Marinette(She is so tired, please give her a break[But also she would be so interesting as an akuma])
Throw stale croissants at Master Fu
Did I mention she is very tired and should be allow to sleep more?
Her parents don't need to worry about her(as much)
Sabine and Tom can know she was Ladybug and be supportive and comfort her for making a Big Girl decision
More time to egg Gabriel's car(and maybe him)
No Yo-Yo = Bite mean akumas who hurt her friends
Help with the Ladyblog
People can make weird conspiracy theories about why Ladybug disappeared
She can maybe know Chat Noir's identity
She is very busy being class president
More time to make friends
Lila loses some ammo
Give Tikki goodbye kiss on cheek
Now only member of class who doesn't have Miraculous(funny)
Bittersweet goodbye with her kitty(May not be forever)