It took nearly a year before these reports started actually becoming a real thing, and even then it was unclear how widespread the problem actually was. MS didn't know what the problem was for a good few months.
Hindsight is 50/50 but they would have required a whole year of extra testing to test for something they would not have even been anticipating in the first place.
They thought they had a readily functioning console from the tests they had done and thought it was ok to launch. Its not about rushing, or incompetence, just bad luck.
Sorry, bad luck doesn't explain 50% fail rate.
You are citing a game informer survey of 5000 of it's own readers who may not even have provided accurate responses due to zero accountability?
That is far from an accurate measure on anything, but i guess when you believe in baseless conspiracy theories, anything constitutes fact.