Posting this here as well:
To be honest I am worried by this line of thinking and policy. Little by little we get used to living in a bubble in our own world, with players around us being nothing more than ghosts, except when we choose to interact with them by pressing a button to achieve a goal we need.
And I ask everyone here.
Was it so terrible for you not to be able to loot every single barrel or crate you came across? Was it so awful to have someone else looting some meager crafting materials just before you looted it?
For me it's the opposite. I enjoyed sharing these containers with other people because it was essentially a clue that the world around me was alive and breathing. I chuckled every time someone got to the barrel a little faster and I looked forward for the next one instead.
For me instanced loot, makes looting containers, a dull, repetitive process of mouse clicks. Every time I see people searching boxes but not taking anything from them, the world around me becomes a little more fake than it was before.

One big reason I'm thankful for a decent crafting system) one thing I've gotten very sick of hearing over the years are the cries of ninja-looter or X stole MY sword/potion/resource/pony. Nothing kills the immersion for me quicker than two grown men arguing over some pixels. It's embarrassing to be completely honest.