People who support the existence of DoH/L bots under the oft faulty notion that the items players sell are overpriced are indeed basically just arguing against the existence of a crafting/gathering system in general.
They often don't understand the concept of a time/labor cost. People want to charge for the time they spend crafting because that time could be being used for other activities. Botters don't care about that, which is why they'll so readily drop prices as they're not actually spending any time on what they do.