DaMoshe:
Your assertion that some Modern Orthodox women do these things but, at the same time, that this has nothing to do with Modern Orthodoxy makes no sense and is also not true.
The reason your assertion makes no sense, and comparisons to L”H, et al. are also irrelevant, is that L”H is certainly no more prevalent among traditional orthodox than by anyone else. So while various Jews of various stripes may fall prey to the Yetzer HaRa in various aveiros and for various reasons, the non-MO still understand that whatever aveira they are doing is forbidden, unlike MO which tries to justify these things, as in, for example, the questionable Broyde piece that a different poster referred to.
The reason your assertion is also not true is that, as above, Rabbi JB Soloveichik created Modern Orthodoxy to institutionalize compromise of the Torah seemingly based on what he felt (against the gedolim of the time) was necessary for then-modern America, and on his mistaken assumption that traditional Orthodoxy would become a museum piece.
Again, this is not like someone walking into McDonalds for a cheeseburger because he just couldn’t resist it (for whatever reason). At least in that case, he knows he’s wrong. Whereas MO “kulas” are wrongly promoted as bona fide kulas.
Even back then, Rav Schwab essentially begged MO to “get with the program” and stop the MO stuff, but the MO refused. Strangely, at least on an institutional level, they still seem to spurn his call, even as MO likes to claim legitimacy as an outgrowth of TIDE, which Rav Schwab himself also denounced as impossible and not true.