Being held in contempt is a very light sentence. Moreover, when a defendant refuses to comply, consequences can only be coercive, not punitive. That means that, e.g. imprisonment is limited, because if 1 year in prison isn't going to coerce you, neither will 10 years.

The great issue here is the total unbreakability of crypto when compared to e.g. a safe. Before this, all we had was human memory which is very limited.