Even if he said it, it doesn't necessarily mean he actually means it. One could imagine that he is as frustrated by the legal impediments to Macross being marketed outside of Japan as any of us and might say that out of frustration. In any case, I don't think he had any problems with Macross Plus being marketed outside Japan nor some of his other stuff for that matter (Escaflowne, Arjuna, Aquarion).
In any case what cannot be denied is that Macross can operate with just its Japanese base. It doesn't need to be marketed outside Japan for it to continue.