Not really. The sexualization of characters who were formerly, despite their revealing costumes, little more than tasteful tittilation mirrors the wider sexually permissive nature of society today compared to say 50 years ago - it's not a little thrill to see a woman in fishnets and a one-piece wail on the baddies once a month any more, and the books are no longer aimed at the 9 year old with a quarter burning a hole in his pocket. Any argument that they're still seriously for the children is mendacious.
There are children's books today - featuring these selfsame characters in sanitized costumes - and they are not overtly sexual in their presentation. Titles where the likes of Cho or Land could never find work, even for the covers.
Those books are for the children. These other ones are for the adults who aren't willing to let go of this piece of their childhood for whatever reason, and have a particularly puerile view of sexuality as a result, all delivered with a nudge and a wink by publishers who really can't believe you're still paying $4 a month to jerk off to shitty drawings of Power Girl when you could download hardcore porn of laughing women hotter than you'll ever dare approach at any bar or social gathering drinking piss out of the five dicks that just fucked them ragged until they puked, all for no more than the cost of your near-essential internet connection.
It's not disingenuous at all to counterpose the words of an innocent character - a child herself - with the hard facts of the reality that would whore her out and forget her in months were she real. Hell, since that page was published girls (and indeed boys) have been born and grown to become sexualized and victims of sexual predators themselves, which is part and parcel of that same casual sexualization of what were once the preserves of innocence and childhood. It isn't just sex that sells, it's the taboo: innocence, corruption, these things are commodity.