Sometimes it's a pain to get good items(like 5 star items) because you need to craft it yourself and cannot directly buy it from the market. You cannot buy it because sometimes when you upgrade an item, the item must have the "complete" (or a certain level) status and requires Heat to do so. To acquire Heat you need to equip it and thus the item becomes bound. (In short, some items must be bound to reach a certain state.)
So why not create an useable item that will let you unbound items? That way we can get items on the market that have already acquired heat and that are impossible to get without buying like 5 recipes and wasting like 1000 CE to forge >.>
someone does follow current events there are plans for an unbinding shop it will cost roughly the same as the cost to make the item thought but OOO has released it