As I posted in another thread, BGS is plenty edgy in their own way (e.g., very highly charged sixual jokes and innuendo of various kinds).
For people who don't understand why these topics always bring up both six and violence, it's because America (with Bethesda being an American company) focuses on violence as being "cool" and "badass" while nudity=six="immoral" and "sinful" and "bad".
In addition, it isn't a matter of what is practical for a company or what they might personally prefer to do. Instead, it's a matter of legal issues that they have to deal with or be concerned about if someone in a target market for their product decides to issue them a lawsuit (or even just make a public outcry, for that matter). Remember that you have video games as a (relatively) new art form and medium for entertainment, so they are and have been a huge target just as other new media have been when first introduced. You already know (or should know, anyway) that the formation of the ESRB in America was due to public pressure on politicians and the industry's response to keep federal laws out of the industry (with academics such as Dr. Henry Jenkins testifying before Congress in order to argue for the freedom of the industry and the art form to have whatever content they wanted as long as it was rated). You have also seen how movie ratings have changed and that TV programs are now rated where they were not rated in the past. Censorship is all over the place. The only reason that you do not see more censorship of books and other written media is because the American Library Association (ALA) is constantly fighting against efforts to ban various books in different areas of the country (you can see a banned books list on their web site and their efforts to prevent censorship of such literature).
Any smart media business in America is very aware of these issues and seeks to avoid them rather than fight the establishment. The establishment changes over time, but that's due to changes in public views, not so much via outright legal means. Instead, the laws change due to public views changing, then the laws get updated (sometimes) to match the public change. Few businesses are interested in attempting to fight the established system in order to make some type of commentary regarding a specific topic. That's not what they are in business for, after all, although they may support efforts to create change via donations or other forms of support.
Edit:
One more example is the popularity of Japanese entertainment. I've studied Japanese entertainment and Japanese culture since the 1980s so I have witnessed the changes both there and in America (and elsewhere to some extent) firsthand. The companies offering such products in America used to be smaller and little-known, so they got away with not paying to have their products officially rated and simply marked them as "Unrated" (just as small film publishers do, for example). However, the Japanese do not have a problem with nudity or sixuality as they have a different culture and history. Various works that wound up in the hands of youth under the age of 18 (and not only works with explicit six, but also works that just had basic nudity, including bath scenes) created a huge public outcry and forced companies to become much more paranoid about how they handled importing foreign products. This also created backlash in Japan and helped to pressure them to create stricter standards for various products, standards that were largely based on cultures and social mores that were not their own but that they listened to because doing so is very much a part of Japanese culture.
Sad? Yes. But this is the world we live in, c'est la vie.