@Avempestad2: I mean everything must come to an end, I think it's nice when ended series still get fanart. It reminds me of the good times I enjoyed, plus it keeps the series alive through the fans and it also introduces new people to the series.
Marisa: What if we kissed in Yuuka's sunflower field?
Reimu: Marisa, she's on the warpath, she's already torched the shrine and killed Cirno, she- okay, just once.
I don't think it's "because Anime logic", it's more that no scars likely markets better with a wider general audience, and takes less work. Personally? I love scars and definitely want more.
^ Hilariously, I think I've seen more people with missing arms, legs and eyes in anime than folks with scars. Apparently, it doesn't matter how much of you is missing, as long as whatever's left is sexy (which is incidentally also the appeal of the guro fetish).