Well, with the information before release, SE was making it sound like crafting classes were no longer going to be in the background/a hobby. Crafters would be able to participate in the main storyline missions, and i guess a lot of us expected that to be battle related content.
And the reason some crafters are complaining, is because SE said that some of the crafting classes would have abilities to debuff the mob, playing an active role in battle. However, there hasn't been a word on the subject. If they're not planning on doing it, they should at least take it down from the main ffxiv website.
Blacksmith's Role
Look on the right side, underneath "Role"