I also have been coming across this, and I'm quite saddened by it. Trust me, I loot everything and within my 19H of play, come across three pairs of shoes, one pair of pants, and one pair of glasses. For some reason it was a lot more streamlined in the first Division, and if I remember correctly, they were more common while searching apartments.
I'm hoping there is quite the abundance of apparel to be found within the game, as it stands right now? I'm not convinced of that.