I will give you that. You don't resort to the you just hate to hate argument, but it is clearly obvious no about of evidence is good enough for you.
Look, if you were willing to go through the games, try to decipher coverage schemes on *every single play*, come up with numbers that say "Henne threw for X passes total. Y were against zone, Z were against man. --% of his Y passes were incomplete/intercepted, which is clearly higher than --% of his Z passes, therefore Henne struggles worse against zone", I'll give up the argument, no questions asked. Hell, I'll even help you chart the plays.
But no one - not a single person - that tries to argue the point has presented any kind of analysis like that; not even for a single game. I'll repeat that: not even for a single game. Hence there's no evidence of what you're trying to prove.