Believe me, he's doing that in your best interests, and is absolutely right to do so!
There is no doubt at all that there is a (fairly small) chance that you could go to prison, so you must absolutely make provision for that, particularly as regards your dependants.
At your trial, be polite and respectful. Wear a suit and tie. Make yourself look like somebody who doesn't belong in prison. At every opportunity, express your regret at your actions.
In other words, play the game...