Still sounds pointless at me. By 2011, the people who get confused at this kind of stuff (aka "the casuals") had already bought the system and were most likely not playing with it anymore. Hell, it was just like one year before the Wii U, so really, why do such a thing? This only serves to annoy people who want Wii with BC because they missed the GC (which, based on the sales of the PS2 vs. GC... was quite a lot)
Maybe it was necessary for the smaller form-factor (which was the aim of the console.) Gamecube controller ports definitely could have added an inch and half-inch to two dimensions of the Wii, making it not all that different.