While I disagree with the OP's suggestion that sexualization = powerlessness, let's not kid ourselves, guys. We can say all we want that there are plenty of women in comics who are not usually sexualized (Wonder Woman, Invisible Woman and Storm come to mind), but pretty much every female superhero out there has been played for sex appeal at some time or another. And enough with that B.S. about men in comics having muscles of steel as sexualization for the ladies. You and I know that's just a cheap cop-out argument with little basis in reality. Women don't go see Superman movies to fantasize about him carrying them away to the Fortress of Solitude. Nor do they watch Die Hard to drool over John McClane. As others have mentioned, characters like Edward Cullen or even freaking Harry Potter have exponentially more drooling, obsessed fangirls than any superhero. Comic books (or at least superhero comics) have for a very long time been almost exclusively been a man's medium, made by men for men, so it stands to reason that the images within superhero comics, both male and female, would be made to appeal to men. The well-muscled men of comics are not a woman's ideal of a man, but a man's view of the ideal man: the man we men want to be, not necessarily the man women want. This applies to countless action heroes in movies and games as well: Conan the Barbarian, Rocky, Rambo, the Terminator, anything Steven Seagal, Vin Diesel or van Damme have ever done, Markus Fenix, Duke Nukem (to parodic effect), Nathan Drake, Kratos, the list goes on. That's the effect they're all going for: our own gender's fantasy about our own body image. It's the image we men have built for ourselves as the ideal. And because sight is naturally much more of a primary sense for men when it comes to sex (compared to smell and touch for women), our view of a good-looking woman is a much bigger part of women's body image than the reverse. As a straight man, I will admit that men tend to be a lot more picky about what we consider an attractive-looking woman than women are for us, and that has a big part to play in what the female ideal is in the eyes of both men and women. So I just don't see how that "sexualized man" argument holds any weight in the terms of the men in action films and comic books. Sure, men are sexualized, but you can't really claim that it's in those media that they are. Superman and Batman are not, nor have they ever been, considered really "sexy" characters. The one real example of overt male sexualization I can offer in action/comic media is James Bond. Heck, I'm straight as an arrow and I'D let Bond have his way with me. But other than that, you have to look at media designed primarily for women to really see male sexualization: rom-coms, soap operas and the like. That's where the sexually appealing guys to women are. And the same logic applies: along with the handsome guys are the women that women want to be like. It's just the different ideals and interests that thousands of years of assigned gender roles have implanted in us. Whether it's nature or nurture, I really don't care.
TL

R: Women are sexualized in comics, men are sexualized in rom-coms (and NOT in comics). Men in comics are the male fantasy of ourselves. This is a surprise to no-one.