Again, the fact remains that at least in part, his suspension was for not cooperating with the investigation. Furthermore, several rules were broke. Deflated balls were used (regardless of intent) and the ball dude took them in an area he shouldn't. Then instead of just working with the NFL, Tommy Boy refuses to cooperate and destroys evidence.
The reality is that there is no way to conclusively know if he cheated or not, so it's the leagues legal right to make that determination. So they did so within their rights within the collective bargaining agreement. Again, this is an employment issue, not an issue about the balls.
What I do find amusing is that I know damn well that Wiz would be agreeing with me if this wasn't his man crush Brady. Haha