As others here have noted none of your comments have anything to do "with the case at hand".
There is absolutely no information available at this time that indicates the pilot in question overstepped his authority in any way. He was on final when the crosswind exceeded his allowables and immediately requested the required change. My understanding is that if he in fact continued along the vector "suggested" that an emergency declared beyond a certain point would greatly complicated things for all parties.
By immediately declaring an emergency he mitigated the complications for others as much as possible.
From all I can gather he exercised his authority in accordance with generally accepted "best practice" until proven otherwise...