Dire Bare
Legend
As has been pointed out multiple times, no one claims that Oriental Adventures is racist in intent, but it is problematic (insensitive or racist) in effect.I don't agree. I think any critique of OA that doesn't take into account the influence Japanese media on Americans is faulty.
Japanese media has a huge influence on American culture, more so than other Asian cultures, and when Americans conflate all Asians as "the same", that stereotype is largely Japanese flavored. Your point explains WHY a pan-Asian D&D setting relies so heavily on Japanese tropes. In that sense, you are not wrong.
But it doesn't change the insensitive/racist effect of the book. It doesn't make it less offensive to those of Asian descent. It doesn't reduce the harm.