> Imprisonment clearly isn't enough to coerce her into complying
By your logic, we should not imprison recidivist criminals, as prison is clearly not enough to deter them from further crimes. So we should just give up, shrug and release them, because apparently nothing can be done about it. In fact, if the criminal solemnly swears they'd go back to the life of crime as soon as they are released from prison, we should immediately release them as it is clear that keeping them in prison would not coerce them to comply with the law, and thus is completely pointless.
>By your logic, we should not imprison recidivist criminals, as prison is clearly not enough to deter them from further crimes.
Criminals are in prison as judgment for being convicted of their crimes. Manning is in prison to be coerced to comply with the grand jury, not as punishment for any action. This is they key difference you are missing. This isn't "my logic," this is the current law of the US, see "Grumbles motion."
By your logic, we should not imprison recidivist criminals, as prison is clearly not enough to deter them from further crimes. So we should just give up, shrug and release them, because apparently nothing can be done about it. In fact, if the criminal solemnly swears they'd go back to the life of crime as soon as they are released from prison, we should immediately release them as it is clear that keeping them in prison would not coerce them to comply with the law, and thus is completely pointless.