You're getting your arguments confused, so I won't bother trying to disentangle them.
Yes, I tend to wave away anything insubstantial, and that's what the Mary Sue argument was. I have no problem with the notion that artists recycle their old work in other contexts, but the earlier context does not, contrary to the MS writer, determine the context of the later work.
Is the CLICK excerpt meant to be sexually stimulating? You betcha, though it's not at all demonstrable that it's only set up to cater to male readers, as the MS writer contends. Manara has asserted that he has a substantial number of female readers, and I have no reason to disbelieve him. There's nothing in the CLICK panel that makes it purely representational of male desire. Some women, I have to believe, may even like seeing hetero sex in which the lady gets naked.
Posters on this thread have gone back and forth on the Spider-Woman cover, as they did when the story was new. It would truly be an "all or nothing" attitude to believe that all the ones who cry "sex" are right and all the ones who say "not that sexy" are wrong. All that can be said is that there's a widespread difference of opinion on the subject, one which ultimately based in taste. Taste can't be argued: there's no argument I can mount that would make the Mary Sue writer cease to behold rampant lubricity in the Manara cover. But for her to make claims about what Manara did, intentionally or otherwise, she has to mount a substantive argument. And she did not. It amounted to nothing but finger-pointing; not unlike the postwar conservatives who damned liberal filmmakers by calling them "Commies" if they included anything in their films that criticized American mores.