Agreed.
Brent could have just came to work each day and either played the whole time or forced the Cowboys or the league to suspend him then.
But it would have been an indefinite suspension, and would have set up the exact same situation as now in having him go in to seek reinstatement. It also wouldn't have helped his cause at all.
Also not sure why his retirement to go on trial and serve the sentence to follow means much. Perhaps it would have been enough had he not dug a deeper hole while waiting to go to trial. He was initially supposed to go to trial in September so he basically retired at a time when he couldn't have played. You retired so you could go to trial and jail, how upstanding of you to do that.
He's probably getting the suspension for the additional failed drug tests last summer while waiting to go on trial, and it's likely that these tests were the thing that prompted him to retire. His retirement came just a couple weeks after he surrendered for the failed tests.
He was probably advised by his lawyer, and Jerry for that matter, to retire just for the sake of preventing any possibility of racking up additional violations of the personal conduct policy.