You're missing the point. Not all shows are created with the same intentions, and thus what we expect from the show are what the creators intend. Hundreds of Millions of people enjoy pornographic movies because when they watch they're not expecting anything resembling a plot, good acting, or really anything. They just ready their hands and get to work. When someone says they're "enjoying" Senran Kagura (like me), we don't mean that in the literally sense. No one here in this room would hold up a show like this to anything like Fate/Zero or The Vision of Escaflowne. It's smut, you look at the bouncy boobies and giggle as your cheeks redden. And so far, it does that quite well.
Sword Art Online, however, is a show that presents itself very seriously. It paints itself as an actual story about characters overcoming trials after being trapped in a sadistically designed MMORPG. However, shortly thereafter the show completely devolves into pandershit. In-game fucking, boob-imouto, practically tentacle porn at one point. After setting lofty expectations it completely fell apart and left (some) people ashamed they'd ever been excited for it. See Final Fantasy XIII for a videogame example.
Understand?