Importance of theme in a cooperative game

Future Wolfie of iSlayTheDragon recently reviewed Samurai Spirit (designer Antoine Bauza, artist Victor P. Corbella, publisher FunForge).  It seems like an interesting game - I've got it on my wishlist - but a couple of sentences in Future Wolfie's review jumped out at me:

In a way it’s like a cooperative version of Blackjack, with much better art and a few special powers thrown in the mix. But that’s what it really boils down to in a sense: trying to hit a maximum total card value without going over.