Wait, your evidence is Jimmy Johnson and what he claims he heard others did 17 years ago, and what he believes is happening now, without naming names, any other teams being implicated, or anyone else corroborating his claims? That might work for mouth-breathers like Mr. WEO, but it's proof of nothing. Oh and Johnson and Belichick are fishing buddies, which speaks to his credibility.
And by the same token, assuming that everyone did cheat, I could say "everyone used steroids so get off Barry Bonds' and Mark McGwire's backs." How do you think that would play to the masses?