I've always found this wrinkle in the industry to be rather fascinating, myself.
Kids haven't been reading comics for decades, it's mostly just us old bastard fans who've been around since forever, and I think we're past the point where you're gonna get kids back into the hobby and LCS. So to that end, there's nothing wrong with delving into a deeper characterization, including sex. I'm not looking for porn here, I don't need any sex scenes or anything like that. But stuff like Lois keeping the Warworld armor, or asking Clark if he has his farmer overalls? That's fine by me. That fits Lois' character and history and is a fun spin on her old Superman obsession. It's kinda brilliant, honestly.
Stuff outside the LCS tends to play by the rules for its age rating. Movies, cartoons, etc., don't dive into the sexual side of the characters all that much. Not beyond the typical "love interest" type stuff anyway. Even Snyder, with all his excesses, never did anything more provacative than have Clark jump in a bathtub with Lois. So to that end, I don't see a problem. If you let your child see a comic they shouldn't, that's on you and not WB/DC, and their other stuff, films/shows/games/etc, are properly labeled with the right age ratings, with the majority of it being acceptable for children.
But the comics taking this more "adult" approach also cuts them off in other avenues like trade and digital copies. The LCS business model is dying and I can't imagine it recovering, but bookstores are doing fine and webtoons are getting pretty big; your comic content not being all-ages friendly across that spectrum is a potential problem. DC does do a lot of kid-focused OGN's, which is great, but that's not getting anyone invested in the main canon.
It's kind of funny in a way. DC struggles to attract the demographic it wants, and the content they make for the fans they have only makes it worse.
And yeah, it's weird that us Americans are perfectly fine with violence in our kid-focused media but we lose our minds if sex is involved. We're an odd culture.