I'm not sure how relevant this is but if gatherers suffer normal fatigue effects like other classes, then I'm not sure how to feel about how they gain reduced sp for not obtaining an item due to 'the gathering of items' fatigue. Crafters are limited to crafting only the amount of materials they can get ahold of (and leves.) Gatherers are limited to gaining only a certain amount of items due to 'the gathering of items' fatigue (and are too limited to leves.) However, gatherers can technically keep gathering at a halved sp rate with no item gain until the class fatigue finally catches up with them. There isn't anything like that for crafting. I can't try to cook nothing and gain a little sp at the cost of the durability of my gear. However, it does seem a bit unfair that crafters can sometimes get higher tiered items to gain sp off of where as gatherers do not have tier 6 nodes to really gather from. I'm not sure if it evens out or not but if you look at it that way, Gatherers have something that no other class has which is gaining sp for only an action and not at the sacrifice of using any materials.

(I am not using any battle classes in this example because I feel they are focused on more than crafting and gathering combined and have a separate category within themselves.)