Comment by array_key_first

The fact that none of this is new undermines your point. Microsoft knew that law enforcement would ask for keys, based on their prior experience and the sack of meat sitting between their ears.

They, knowing that, chose to design a system that trivially allows this. That is a choice. In that sense, they did give up the keys. They certainly did not have to design it that way, nor was it done in ignorance.