P’s Advance Decision to Refuse Treatment is not valid, not applicable, and not a reflection of her past or present wishes

It seems to me that the judge was entitled to make the decision that P’s ADRT was invalid. That causes me concern because of what it means not just for P but for everyone else with ADRTs.  Do our ADRTs adequately reflect what we want? Do we really understand what they might mean for how we are treated – or not treated – in future?