So they should make him unavailable immediately, just to avoid the chance that he might be unavailable in the future? Isn't that the definition of cutting off the nose to spite the face? He'd obviously be cut on the spot if he did it AGAIN later, so your scenario doesn't work anyway. In fact, but your logic, may as well cut Brady now, in case he gets hurt someday and isn't able to start a key game. Only way that makes sense is if you're the GM of another team...
You are ridiculous.
If he is unavailable during the season, due to the way contracts in the NFL work, he is still owed his full season salary. If they cut him now, they don't pay him anything and only take the cap hit (which is $43k).