Let us craft using items stored on retainers

I love the way crafting and gathering is done in this game (for the most part and I'm only 46 all in crafts so I'm not commenting on the scripts or whatever) but there is one thing that I feel would be a significant improvement and it's a simple suggestion.

Let us craft using items that are stored on our retainers. This doesn't make logical sense but it would really streamline the whole crafting process and it would save on what is often sorely needed inventory space. 80% of my inventory is filled with stacks of common crafting mats and I basically get half a page for items after my stacks of food/potions fill the other half.

A lot of other games do this such as Monster Hunter, Ragnarok Oddysey ACE, I'm sure many others too. It just makes sense when you want to do item synthesis and there are hundreds of potential component items a player might need.