I am sure the artist had his thought when he created his art....so also Tarot Deck.
Almost never will the Artist tell what he really wanted to say with his master piece....he/she let the viewer make up his/her own mind what they see in the art and this might give room for several books, when different people shall tell what they see as most important in a piece.
When it comes to symbols, then I agree with Jaggedblade.....symbols are like letters....they are given a meaning...and can not be evaluated the same way as the art itself.
But since very little is fixed in the world of "magic", the most important thing with the cards is what it tells the Reader, regardless of what the intent of the creator of the deck was.
This is only mine opinion though.....and I am not even a Reader
