I rest my case. Japophiles have a brain disease that makes them unable to distinguish tit for tat. Objectivity is impossible with those type of people. "Silent Hill's plot is deeyp 'n shit, 'cause of symbolism". But first of all, symbolism has jack shit to do with plot in the first place, so that the argument is already fallacious, and second, symbolism doesn't real equal depth in and of itself, and for the most part, symbolism is the first refuge of the pretentious, so much so that certain artists, like Tarkovsky for instance, actually went out of their way to repudiate the entire concept of symbolism:
http://people.ucalgary.ca/~tstronds/nostalghia.com/TheTopics/Symbols.html
This might be an exaggerated reaction because there is a place for symbolism in art, but when every idiot tries to interpret every single image in a work of art as containing some type of symbolic meaning, it reduces and limits the scope of artistic expression and saps all meaning and poetry out of artistic imagery.
Aside for this, all your arguments can be reduced to some relativistic apologia. "Japanese games are just as complex, just in their own way". This doesn't really mean anything, for now the definition of "complexity" is up for grabs, and complex can mean anything one wishes it to mean, which renders the discussion pointless.
BTW, there is one fallacy that is often used in those type of arguments, and that is the idea that if one considers a particular genre to be inherently inferior, it means one also thinks there can be no talent or creativity in it (or that conversely, western developers can't be shit. This is far from being the case, and there is no question that there is a lot of talent being poured in Japanese games. But it is the form itself that limits the reach of those games. Quite simply, the Japanese don't take gaming as seriously as westerners did (at least for a time), at least from the point of view of the possibilities inherent in this medium. Comparing the progress of PC games from the late 70s up until the failbox fuck it up side by side with the Japanese industry is quite enlightening.
BTW, perhaps we can make a similar analogy by comparing Japanese animation with western animation. I'm often told that the Japanese take animation a lot more seriously, where as western animation is strictly seen as entertainment for children (whatever its quality). Now i know jack shit about animation, but if this is true, wouldn't be strange to argue that western animation can be as "profound" as Japanese animation if the latter is actually free to address adults, where as the first cannot?