I don't think there is a problem with nudity in general. I agree with the nsfw tag because it allows people who do not wish to view nudity or sexual situations to filter that content.
I have children. One of my children uses Steemit. She has nipples too, I don't think she'd be traumatized by seeing them. My sons have unfortunately been influenced by the world around them, therefore they have been made to believe the naked body is "sexual" and "private". Personally I think this is absurd, but there is only so much I can fight it without my competence as a parent being called into question.
I am all for the tasteful nude, or even the tasteless nude. In today's world it has a place and that place is unique to each person. For that reason feel free to free the nipple, pussy, penis, anything you like to free ... just give people the option to opt out.
I do have to wander, what are kids doing on this site? I don't think this place is very well suited for youngsters, nsfw tags of not. Shit, if all the dumb stuff I posted as a teenager would be permanently saved to a blockchain, I'd be mortified :'D But thank you for sharing a view on this matter as a parent.