If I'm understanding what they said correctly, the non-HQ thing applies only to raw ingredients such as ore and skins. You can then craft HQ processed materials to use when crafting a finished item. I've been trying to figure out why they decided to do this since "saving inventory space" doesn't seem like a huge deal to me. I'm willing to bet that they're hoping to combat gathering bots somehow by making this change as we won't "need" to buy huge stacks of HQ raw materials to reliably craft that quest item we need to reliably HQ.