I think that the reason would be that this is the YESHIVAH WORLD coffee room, not the Modern Orthodox Machmir or Mekeil CR. I agree with you that it often appears that one side is being given bigger latitude to expressing itself, than another. But this IS a site that comes with a certain hashkafa and agenda as it were, and whether or not we might all agree hashkafically, we have to recognize the source behind the site. If you want to post on a less restrictive blog, you will have to find a non-moderated group.
I am not Yeshivish, and I have often felt that certain opinions expressed strongly here, were not in line with my own religious hashkafa (i.e., I don’t see denim skirts per se as untzniusdig). But I also recognize that on a Yeshivish site, perhaps others might feel differently, and I respect our differences.