The point is not all sneezes are due to colds. There are other causes that account for much more than .1%. Don't reinfoce societal pressure with biased probability analysis.
Agreed, but I think what is ridiculous is training your lungs to minimize the effectiveness of your sneeze. That is absolutely ridiculous: your body is sneezing for a reason, let it do its thing (and cover it).
They aren't saying don't sneeze, they're saying cover your sneeze. It doesn't matter why you are sneezing, covering it is the standard.