Yes, the amount foods and medicines moved in a day will increase. If you take a look at the current wards you can see how most consumables still go unsold. Honestly, it is much of a problem now though most players are more preoccupied with getting all crafts to 50 so it is not as evident.

Even if you triple my example of 360 units pushed in 48 hours, you come up to 1080 units. One person selling 5 stacks of x99 would be able to meet nearly half of the demand for two days. Imagine now, multiply the number of crafters for each individual craft(if 2.0 is successful). Crafting jobs exist to make money, and the fix for for any job or class should never be "level another job/class."