I'm just stating the obvious they did this because of the option of get two extra retainers which you have to pay monthly for as well. Thankfully the price isn't to steep, but it would be nice if they could do something like that. Another game I played, they had a system where you crafting materials each had it's own space separate from the bank or your own inventory. The way it was set up is that you would get gather the item and that item would be put into player's inventory and from inventory you had the option to send all crafting materials in your inventory to your crafting mat's space.