That is pure nonsense. A total non-sequiter. The only thing is "shows" is they'd prefer not to have to address certain questions before they have answers.
To my knowledge, no one has "dismissed" anything at this point...other than the plane story.
They dismissed eyewitness accounts before any investigation was even started. When the first order of business is to convince the public of the outcome of an investigation that hasn't even begun, how much should we trust that investigation?