Desynthing Artisan Gear

Is anyone else wondering why upon release they made the Artisan Spectacles and Forager Hat Desynthable yet we can't desynth the new Artisan set that is gained in the same manner as the Spectacles.

I"m just slightly disappointed by it cause I thought I had actually found a way for Carpenter to have a slightly easier method of obtaining Mastercraft Demimateria but nope you can't desynth the Artisan Pattens.

I"m just wondering why they decided this just seems odd in my opinion.