I think its good place to start here with medical wearables (which btw i wish they recategorize those other medical wear like bandages in now that we have it)(oh and i wish we get more patches and plasters n stuff for it) but true it would have been nice to have those scars for female frame too
I feel like it was really not on do list to get to cancer yet though because then they would also need to make it so our sims can have one breast for example and i think thats tad more work than adding the scars to existing frames
I also wonder if its because female sims wear bra that there might have to be alterations to even see the said scars other than very specific outfits
but i hope they add the scars for female sims too because that would indeed make some more sense (say in case of boob addition or reduction)