https://imgur.com/a/UM5JIBE
Thank God.
For those of you who don't understand, there are 3 artisan classes in AoC: gathering, processing and crafting.
Under each of these artisan classes, you have a set of professions.
What Steven said above is that, you can only master 1 artisan class out of the 3.
And in that 1 artisan class, you can master multiple professions but NOT ALL of them.
This is a HUGE relief, as previously it was believed that players could master ALL the professions under a single artisan class.
I wonder how this works for Processing, but I think they'll make it so that players can master both animal husbandry and smelting since they are the only 2 professions under it.