That is not what "death of the author", which is an actual lens of critical theory, means at all. I also highly doubt whoever you saw say once that Mario is about communism was serious, but people say all kinds of things, so who knows. Anyway, "someone made a bad read once" is not exactly a great argument against anything.
At any rate none of this has anything to do with Austin. If you think The Division, which is what this seems to be about, has no political (intentional or otherwise) undertones at all, despite numerous pieces having been written about this, that only says something about you.