Well BCNext is far smarter than me, unless he says that he cant implement a practical indistinguishability obfuscator, who am I to say that he cant?
The article you yourself posted says it's not ready for commercial applications:
"However, the new obfuscation scheme is far from ready for commercial applications. The technique turns short, simple programs into giant, unwieldy albatrosses. And the schemes security rests on a new mathematical approach that has not yet been thoroughly vetted by the cryptography community. It has, however, already withstood the first attempts to break it."
BCNext from what I understand isn't even cryptographer. I doubt he would have any clue how to approach this.