Ignoring the fact that no pennies would be spent during the time I am proposing, sure, whatever
Fine, use the Steve McNair example you provided. That was clearly an example of a team holding a player they had no intention of keeping. Or Laverneous Coles wanting to get out of Washington in 2003 (Must confess, I don't know when the start of the league year was, but living in the area, I know Snyder made it clear he would not grant Coles request for a release). And there are many others, it happens, and considering you provided a great example, I don't know why you are pretending that it doesn't happen.