I already posted my thoughts about this from an artists point of view in another topic so I'll just link that here.
I think this is partly a weird form of PR that may be trying to prevent sites like Polygon from creating drama. It seems weird to me that anybody would want to promote their game by saying some fans will be disappointed.
The statements here are not that different from Shimbori when he was saying Dead Or Alive 6 would be toned down. Both the MK11 and DOA6 have statements that some fans will be disappointed now. I suspect that they are told to say stuff like this.
Saying nothing at all is much better than taking a stance against some fans. Considering the popularity of cosplay and fan art it seems weird to bring this up as it will just cause more division among fans. Just what we need, right?
It doesn't look to be true, anyway. DOA6 did not tone down despite all the months of interviews saying otherwise and MK11 has lots of skin showing on male characters which doesn't match the statements about not showing skin. I wouldn't be surprised if there are classic outfits and more skin showing for the women in the game that they are just not showing.