@gooochyeee Some women get breast implants after breast cancer surgery. Also, the male rig with female frame doesn't look the same as the female rig with female frame, and male and female sims have different body language, so, depending on what type of sim one wants to create, it's not always the best option to go with the other rig and pick the preferred frame instead. Especially since the pronoun settings are only available when the game is installed in English, none of the other languages have been given the pronoun settings yet (which, btw, causes problems on its own, as in not being able to see or change a sim's name in CAS if they have a customised pronoun in a non-English game, as seen with Jay Robles from Growing Together, couldn't find a bug report on it though).
Btw, here's a thread on gender limitations in TS4 (it sprung out of the new pronoun settings, but is about gender in general).
Here are some examples of clothes where I'm quite sure top surgery scars will show (the last three are meshed for the male rig, so they look a little wonky, especially the side-profile, but they're still available, so I added them as examples anyway). I'm sure there are more, I just quickly scrolled through everything in CAS to find some examples.
I also want to add that breast implants also would give scars, so there are many reasons why these scars should be available for female sims too.
