I mean that's the whole idea, you don't create knowledge out of nothing. But it's more than just preexisting belief, you try to grab it from collective unconscious.

Plus, card on itself doesn't tell you anything SPECIFIC. The whole point of cards and magic is to believe that this specific card has bigger meaning, thus you need to interpret it, and think about it's meaning. And thinking is useful. What conclusion you come up with depends more on the situation than the card itself.

I’m not sure you understand witchcraft from the perspective of those that practice it. It sounds more to me like you’re talking about a caricature of witchcraft and pagan practices, rather than what most witches actually believe

Others have elaborated further, but I'll give an example you can probably agree with:

If you're having trouble making a decision, you can flip a coin. This is actually really useful if you don't actually let the coin make the decision. If you're disappointed with the result, you then found out you liked the other result better, and you should do that instead. There's no magic. It's just a way to help ourselves gain insight into what we believed but we're having trouble realizing.

So it's less silly... to talk aloud to yourself... in a way that never provides answers..?

Yikes guy.