"Full Width" Isnt really a Full width

http://destinblack.net/ I had to change from the Parallax Pro theme to the full frame theme because parallax full width didnt seem to give me a truly full width page. As a bonus, I like the header much better in Full frame. the Parallax Pro header was never as narrow as I wanted. Sadly, I am still having a couple of issues with Full frame. Despite the name, it isn't really a full width page. The content is still set inside a fixed width element. Unfortunately, sometimes I just need a page that has a true full width design. Is it done this way to make it responsive? Is there some reason I cant have a 100% width for the wrapper and the content? I am trying to get my art portfolio online and I want to be able to put up large image maps that can fill the entire screen. I want to be able to display the maps on my large screen televisions when I have an exhibit. I know I can make these using lots of other non-web design based tools, but I really like the idea of doing it within a website that viewers can take with them and explore further. I know I can do this with page builders, but it creates such messy code, sometimes I dont want to.