If these people who practice witchcraft are frauds, then why would they say that its not working? Wouldn't they pretend it worked and whenever something bad happens next, just claim the credit.

However, just want to add. As a former atheist from birth who turned agnostic in my 20s when I realised I cannot prove scientifically that God does not exist, and who found Jesus after going down the Q rabbit holes, here is my sincere suggestion. This is what I did over my lifetime purely as part of pursuit of knowledge, and I think its something every atheist should do.

Pick the most basic essence of at least 3 religions and read them with the intent of understanding what the message is. Make sure you include Christianity, and the best writing for the essence of Christianity is what someone suggestion to me - Gospel according to James in the New Testament.

Firstly, see if there is a common thread amongst all the teachings. Secondly, ask yourself whether the story of Jesus resonates with you in anyway. After that ask yourself if there are any parts of your own life you find is impossible to explain purely mathematically.

If any of this makes you feel even a little that there may be something to spirituality, practise a bit of mindfulness meditation and see if you feel anything.

Regardless of the outcome, you will be wiser having done a few experiments in spirituality.