They were another closet monster from 1.0 that wasn't put in to 2.0 and onward. The original catalyst system was also crafted (all the fine sand you get from desynth,) that was shard ingredients, used by Alchemists to make shards that could then be made in to crystals that could then be made in to clusters and back again. Go to the market board. Lightning and Wind crystals sell for 100+ Gil each, Lightning and Wind Clusters go for 5 Gil each. That never would have happened in the original system as a cluster was crystals, you just needed an Alchemist to reduce them.
In 2.0 and on, it would make more sense to put those recipes in the Other tab and allow specific classes to create and reduce according to the ones they use, at levels, over just giving it all to Alchemist but either way it would pull the rug out from under catalyst markets. Because yea, I agree with you. 99% of the time, if I am not crafting it isn't material I am short on, it's crystals and I am waiting for my retainers to bulk the numbers back up again.