The License is for a miniatures game. They are not really able to print cards as a standalone product.
Considering that the dice app applies to all their Star Wars games, I think they have some room to mix their licenses up a bit. This is pretty much a business decision.
If they wanted to print more money for the house of mouse, they would do it... they don't seem interested in making money this way for whatever reason. I really doubt licensing is the issue.
They make more money from selling the model than they would a card pack. This assumption that a card pack would make them more money is silly.