To add to my previous reply,

Most of the items in OP's list are not of lasting use. They have a singular purpose and you need a very finite number of them, however many you require to make one of each relic that you care to make, and then you never need another one again.

Example: You need at most 57 of each Manderville ore, plus one ore per restat if you somehow don't pick the right stats the first time. You should be able to get the stats right within one restat, and then you never need another one again.

Example: You need at most 13 of each Luminous [Element] Crystal, and then you never need another one again.

Example: You need at most 130 of each Unidentifiable anima weapon item. After this, two of them have no other use. The other two can be used to purchase soil and nothing else, but the soil is also available from other sources.

It would be wasteful to move those items to Currency and have them take up permanent space in the data structure when the vast majority of people won't need to collect or spend them after just one or two relics, if they want to make any relics to begin with.