We don't know that it is restrictive.

We know nothing but a word. One word. Everything else is speculation. Some of the speculation so far:

We will only be able to hit 60 in X many crafts

We will specialize within a craft. Example somewhere in the thread was fish for cooking. Another would be gem cutting for Goldsmith.

I don't remember any other ideas on how specialization might work.

How about coming up with a few more?